diff --git a/Backend/models/booking.go b/Backend/models/booking.go
index 6704913..6c74f23 100644
--- a/Backend/models/booking.go
+++ b/Backend/models/booking.go
@@ -36,6 +36,7 @@ type Booking struct {
 	Timestamp   time.Time   `json:"timestamp"`
 	CounterId   int         `json:"counter_id"`
 	BookingType BookingType `json:"anwesenheit_typ"`
+	Valid       bool        `json:"valid"`
 }
 
 type IDatabase interface {
@@ -252,12 +253,13 @@ func (b *Booking) Update(nb Booking) {
 func checkLastBooking(b Booking) bool {
 	var check_in_out int
 	slog.Info("Checking with timestamp:", "timestamp", b.Timestamp.String())
-	stmt, err := DB.Prepare((`SELECT check_in_out FROM "anwesenheit" WHERE "card_uid" = $1 AND "timestamp"::DATE <= $2::DATE ORDER BY "timestamp" DESC LIMIT 1;`))
+	stmt, err := DB.Prepare((`SELECT check_in_out FROM "anwesenheit" WHERE "card_uid" = $1 AND "timestamp" <= $2 ORDER BY "timestamp" DESC LIMIT 1;`))
 	if err != nil {
 		log.Fatalf("Error preparing query: %v", err)
 		return false
 	}
 	err = stmt.QueryRow(b.CardUID, b.Timestamp).Scan(&check_in_out)
+	slog.Info("Checking last bookings check_in_out", "Check", check_in_out)
 	if err == sql.ErrNoRows {
 		return true
 	}
diff --git a/Backend/models/workDay.go b/Backend/models/workDay.go
index 4477323..912e519 100644
--- a/Backend/models/workDay.go
+++ b/Backend/models/workDay.go
@@ -186,97 +186,148 @@ func GetWorkDays(user User, tsFrom, tsTo time.Time) []WorkDay {
 	var workSec, pauseSec float64
 
 	qStr, err := DB.Prepare(`
-	WITH all_days AS (
-    	SELECT generate_series($2::DATE, $3::DATE - INTERVAL '1 day', INTERVAL '1 day')::DATE AS work_date),
-     normalized_bookings AS (
-         SELECT *
-         FROM (
-             SELECT
-                 a.card_uid,
-                 a.timestamp,
-                 a.timestamp::DATE AS work_date,
-                 a.check_in_out,
-                 a.counter_id,
-                 a.anwesenheit_typ,
-                 sat.anwesenheit_name AS anwesenheit_typ_name,
-                 LAG(a.check_in_out) OVER (
-                     PARTITION BY a.card_uid, a.timestamp::DATE
-                     ORDER BY a.timestamp
-                 ) AS prev_check
-             FROM anwesenheit a
-             LEFT JOIN s_anwesenheit_typen sat
-                 ON a.anwesenheit_typ = sat.anwesenheit_id
-             WHERE a.card_uid = $1
-               AND a.timestamp::DATE >= $2
-               AND a.timestamp::DATE <= $3
-         ) t
-         WHERE prev_check IS NULL OR prev_check <> check_in_out
-     ),
-     ordered_bookings AS (
-         SELECT
-             *,
-             LAG(timestamp) OVER (
-                 PARTITION BY card_uid, work_date
-                 ORDER BY timestamp
-             ) AS prev_timestamp
-         FROM normalized_bookings
-     )
-	SELECT
-	    d.work_date,
-	    COALESCE(MIN(b.timestamp), NOW()) AS time_from,
-	    COALESCE(MAX(b.timestamp), NOW()) AS time_to,
-	    COALESCE(
-	        EXTRACT(EPOCH FROM SUM(
-	            CASE
-	                WHEN b.prev_check IN (1, 3) AND b.check_in_out IN (2, 4, 254)
-	                THEN b.timestamp - b.prev_timestamp
-	                ELSE INTERVAL '0'
-	            END
-	        )), 0
-	    ) AS total_work_seconds,
-	    COALESCE(
-	        EXTRACT(EPOCH FROM SUM(
-	            CASE
-	                WHEN b.prev_check IN (2, 4, 254) AND b.check_in_out IN (1, 3)
-	                THEN b.timestamp - b.prev_timestamp
-	                ELSE INTERVAL '0'
-	            END
-	        )), 0
-	    ) AS total_pause_seconds,
-	    COALESCE(jsonb_agg(jsonb_build_object(
-	        'check_in_out', b.check_in_out,
-	        'timestamp', b.timestamp,
-	        'counter_id', b.counter_id,
-	        'anwesenheit_typ', b.anwesenheit_typ,
-	        'anwesenheit_typ', jsonb_build_object(
-	            'anwesenheit_id', b.anwesenheit_typ,
-	            'anwesenheit_name', b.anwesenheit_typ_name
-	        )
-	    ) ORDER BY b.timestamp), '[]'::jsonb) AS bookings
-	FROM all_days d
-	LEFT JOIN ordered_bookings b ON d.work_date = b.work_date
-	GROUP BY d.work_date
-	ORDER BY d.work_date ASC;`)
+		WITH
+  all_days AS (
+    SELECT
+      generate_series(
+        $2 ::DATE,
+        $3 ::DATE - INTERVAL '1 day',
+        INTERVAL '1 day'
+      )::DATE AS work_date
+  ),
+  all_bookings AS (
+    SELECT
+      a.card_uid,
+      a.timestamp,
+      a.timestamp::DATE AS work_date,
+      a.check_in_out,
+      a.counter_id,
+      a.anwesenheit_typ,
+      sat.anwesenheit_name AS anwesenheit_typ_name,
+      LAG(a.check_in_out) OVER (
+        PARTITION BY
+          a.card_uid,
+          a.timestamp::DATE
+        ORDER BY
+          a.timestamp
+      ) AS prev_check,
+      LAG(a.timestamp) OVER (
+        PARTITION BY
+          a.card_uid,
+          a.timestamp::DATE
+        ORDER BY
+          a.timestamp
+      ) AS prev_timestamp
+    FROM
+      anwesenheit a
+      LEFT JOIN s_anwesenheit_typen sat ON a.anwesenheit_typ = sat.anwesenheit_id
+    WHERE
+      a.card_uid = $1
+      AND a.timestamp::DATE >= $2::DATE
+      AND a.timestamp::DATE <= $3::DATE
+  ),
+  normalized_bookings AS (
+    SELECT
+      *
+    FROM
+      all_bookings
+    WHERE
+      prev_check IS NULL
+      OR prev_check <> check_in_out
+  )
+SELECT
+  d.work_date,
+  COALESCE(MIN(b.timestamp), NOW()) AS time_from,
+  COALESCE(MAX(b.timestamp), NOW()) AS time_to,
+  EXTRACT(
+    EPOCH
+    FROM
+      SUM(
+        CASE
+          WHEN b.prev_check IN (1, 3)
+          AND b.check_in_out IN (2, 4, 254) THEN b.timestamp - b.prev_timestamp
+          ELSE INTERVAL '0'
+        END
+      )
+  ) AS total_work_seconds,
+  EXTRACT(
+    EPOCH
+    FROM
+      SUM(
+        CASE
+          WHEN b.prev_check IN (2, 4, 254)
+          AND b.check_in_out IN (1, 3) THEN b.timestamp - b.prev_timestamp
+          ELSE INTERVAL '0'
+        END
+      )
+  ) AS total_pause_seconds,
+  jsonb_agg(
+    jsonb_build_object(
+      'check_in_out',
+      b.check_in_out,
+      'valid',
+      coalesce(b.check_in_out != b.prev_check, true),
+      'timestamp',
+      b.timestamp,
+      'counter_id',
+      b.counter_id,
+      'anwesenheit_typ',
+      jsonb_build_object(
+        'anwesenheit_id',
+        b.anwesenheit_typ,
+        'anwesenheit_name',
+        b.anwesenheit_typ_name
+      )
+    )
+    ORDER BY
+      b.timestamp
+  ) FILTER (
+    WHERE
+      b.card_uid IS NOT NULL
+  ) AS bookings
+FROM
+  all_days d
+  LEFT JOIN all_bookings b ON b.work_date = d.work_date
+GROUP BY
+  d.work_date;
+	`)
 
 	// qStr, err := DB.Prepare(`
 	// WITH all_days AS (
 	//    	SELECT generate_series($2::DATE, $3::DATE - INTERVAL '1 day', INTERVAL '1 day')::DATE AS work_date),
-	//    ordered_bookings AS (
-	//     SELECT
-	//         a.timestamp::DATE AS work_date,
-	//         a.timestamp,
-	//         a.check_in_out,
-	//         a.counter_id,
-	//         a.anwesenheit_typ,
-	//         sat.anwesenheit_name AS anwesenheit_typ_name,
-	//         LAG(a.timestamp) OVER (PARTITION BY a.card_uid, a.timestamp::DATE ORDER BY a.timestamp) AS prev_timestamp,
-	//         LAG(a.check_in_out) OVER (PARTITION BY a.card_uid, a.timestamp::DATE ORDER BY a.timestamp) AS prev_check
-	//     FROM anwesenheit a
-	//     LEFT JOIN s_anwesenheit_typen sat ON a.anwesenheit_typ = sat.anwesenheit_id
-	//     WHERE a.card_uid = $1
-	//       AND a.timestamp::DATE >= $2
-	//       AND a.timestamp::DATE <= $3
-	// )
+	//     normalized_bookings AS (
+	//         SELECT *
+	//         FROM (
+	//             SELECT
+	//                 a.card_uid,
+	//                 a.timestamp,
+	//                 a.timestamp::DATE AS work_date,
+	//                 a.check_in_out,
+	//                 a.counter_id,
+	//                 a.anwesenheit_typ,
+	//                 sat.anwesenheit_name AS anwesenheit_typ_name,
+	//                 LAG(a.check_in_out) OVER (
+	//                     PARTITION BY a.card_uid, a.timestamp::DATE
+	//                     ORDER BY a.timestamp
+	//                 ) AS prev_check
+	//             FROM anwesenheit a
+	//             LEFT JOIN s_anwesenheit_typen sat
+	//                 ON a.anwesenheit_typ = sat.anwesenheit_id
+	//             WHERE a.card_uid = $1
+	//               AND a.timestamp::DATE >= $2
+	//               AND a.timestamp::DATE <= $3
+	//         ) t
+	//         WHERE prev_check IS NULL OR prev_check <> check_in_out
+	//     ),
+	//     ordered_bookings AS (
+	//         SELECT
+	//             *,
+	//             LAG(timestamp) OVER (
+	//                 PARTITION BY card_uid, work_date
+	//                 ORDER BY timestamp
+	//             ) AS prev_timestamp
+	//         FROM normalized_bookings
+	//     )
 	// SELECT
 	//     d.work_date,
 	//     COALESCE(MIN(b.timestamp), NOW()) AS time_from,
@@ -330,26 +381,29 @@ func GetWorkDays(user User, tsFrom, tsTo time.Time) []WorkDay {
 		var workDay WorkDay
 		var bookings []byte
 		if err := rows.Scan(&workDay.Day, &workDay.TimeFrom, &workDay.TimeTo, &workSec, &pauseSec, &bookings); err != nil {
-			log.Println("Error scanning row!", err)
+			slog.Error("Error scanning row!", "Error", err)
 			return workDays
 		}
 		workDay.workTime = time.Duration(workSec * float64(time.Second))
 		workDay.pauseTime = time.Duration(pauseSec * float64(time.Second))
-		err = json.Unmarshal(bookings, &workDay.Bookings)
-		if err != nil {
-			log.Println("Error parsing bookings JSON!", err)
-			return nil
+		if bookings != nil {
+			err = json.Unmarshal(bookings, &workDay.Bookings)
+			if err != nil {
+				slog.Error("Error parsing bookings JSON!", "Error", err, "Json", bookings)
+				return nil
+			}
 		}
+
 		// better empty day handling
-		if len(workDay.Bookings) == 1 && workDay.Bookings[0].CounterId == 0 {
-			workDay.Bookings = []Booking{}
-		}
+		// if len(workDay.Bookings) == 1 && workDay.Bookings[0].CounterId == 0 {
+		// 	workDay.Bookings = []Booking{}
+		// }
 		if len(workDay.Bookings) >= 1 || !helper.IsWeekend(workDay.Date()) {
 			workDays = append(workDays, workDay)
 		}
 	}
 	if err = rows.Err(); err != nil {
-		log.Println("Error in workday rows!", err)
+		slog.Error("Error in workday rows!", "Error", err)
 		return workDays
 	}
 	return workDays
diff --git a/Backend/static/css/styles.css b/Backend/static/css/styles.css
index 4b2dd1d..553198f 100644
--- a/Backend/static/css/styles.css
+++ b/Backend/static/css/styles.css
@@ -205,9 +205,15 @@
   .top-0 {
     top: calc(var(--spacing) * 0);
   }
+  .top-1 {
+    top: calc(var(--spacing) * 1);
+  }
   .top-1\/2 {
     top: calc(1/2 * 100%);
   }
+  .top-2 {
+    top: calc(var(--spacing) * 2);
+  }
   .top-2\.5 {
     top: calc(var(--spacing) * 2.5);
   }
@@ -217,9 +223,15 @@
   .right-1 {
     right: calc(var(--spacing) * 1);
   }
+  .right-2 {
+    right: calc(var(--spacing) * 2);
+  }
   .right-2\.5 {
     right: calc(var(--spacing) * 2.5);
   }
+  .left-1 {
+    left: calc(var(--spacing) * 1);
+  }
   .left-1\/2 {
     left: calc(1/2 * 100%);
   }
@@ -350,6 +362,9 @@
   .block {
     display: block;
   }
+  .contents {
+    display: contents;
+  }
   .flex {
     display: flex;
   }
@@ -383,6 +398,9 @@
   .h-2 {
     height: calc(var(--spacing) * 2);
   }
+  .h-3 {
+    height: calc(var(--spacing) * 3);
+  }
   .h-3\.5 {
     height: calc(var(--spacing) * 3.5);
   }
@@ -407,6 +425,9 @@
   .w-2 {
     width: calc(var(--spacing) * 2);
   }
+  .w-3 {
+    width: calc(var(--spacing) * 3);
+  }
   .w-3\.5 {
     width: calc(var(--spacing) * 3.5);
   }
@@ -416,6 +437,9 @@
   .w-5 {
     width: calc(var(--spacing) * 5);
   }
+  .w-9 {
+    width: calc(var(--spacing) * 9);
+  }
   .w-9\/10 {
     width: calc(9/10 * 100%);
   }
@@ -428,6 +452,9 @@
   .w-full {
     width: 100%;
   }
+  .flex-shrink {
+    flex-shrink: 1;
+  }
   .flex-shrink-0 {
     flex-shrink: 0;
   }
@@ -443,10 +470,21 @@
   .basis-\[content\] {
     flex-basis: content;
   }
+  .border-collapse {
+    border-collapse: collapse;
+  }
+  .-translate-x-1 {
+    --tw-translate-x: calc(var(--spacing) * -1);
+    translate: var(--tw-translate-x) var(--tw-translate-y);
+  }
   .-translate-x-1\/2 {
     --tw-translate-x: calc(calc(1/2 * 100%) * -1);
     translate: var(--tw-translate-x) var(--tw-translate-y);
   }
+  .-translate-y-1 {
+    --tw-translate-y: calc(var(--spacing) * -1);
+    translate: var(--tw-translate-x) var(--tw-translate-y);
+  }
   .-translate-y-1\/2 {
     --tw-translate-y: calc(calc(1/2 * 100%) * -1);
     translate: var(--tw-translate-x) var(--tw-translate-y);
@@ -457,33 +495,21 @@
   .cursor-pointer {
     cursor: pointer;
   }
+  .resize {
+    resize: both;
+  }
   .scroll-m-2 {
     scroll-margin: calc(var(--spacing) * 2);
   }
   .appearance-none {
     appearance: none;
   }
-  .break-after-page {
-    break-after: page;
-  }
-  .auto-rows-min {
-    grid-auto-rows: min-content;
-  }
   .grid-cols-2 {
     grid-template-columns: repeat(2, minmax(0, 1fr));
   }
   .grid-cols-5 {
     grid-template-columns: repeat(5, minmax(0, 1fr));
   }
-  .grid-cols-\[3fr_2fr_2fr_2fr_3fr_3fr_3fr\] {
-    grid-template-columns: 3fr 2fr 2fr 2fr 3fr 3fr 3fr;
-  }
-  .grid-cols-subgrid {
-    grid-template-columns: subgrid;
-  }
-  .grid-rows-6 {
-    grid-template-rows: repeat(6, minmax(0, 1fr));
-  }
   .flex-col {
     flex-direction: column;
   }
@@ -534,11 +560,6 @@
       border-bottom-width: calc(1px * calc(1 - var(--tw-divide-y-reverse)));
     }
   }
-  .divide-neutral-300 {
-    :where(& > :not(:last-child)) {
-      border-color: var(--color-neutral-300);
-    }
-  }
   .justify-self-end {
     justify-self: flex-end;
   }
@@ -565,18 +586,10 @@
     border-style: var(--tw-border-style);
     border-width: 0px;
   }
-  .border-r-0 {
-    border-right-style: var(--tw-border-style);
-    border-right-width: 0px;
-  }
   .border-r-1 {
     border-right-style: var(--tw-border-style);
     border-right-width: 1px;
   }
-  .border-b-0 {
-    border-bottom-style: var(--tw-border-style);
-    border-bottom-width: 0px;
-  }
   .border-dashed {
     --tw-border-style: dashed;
     border-style: dashed;
@@ -587,9 +600,6 @@
   .border-neutral-500 {
     border-color: var(--color-neutral-500);
   }
-  .border-neutral-600 {
-    border-color: var(--color-neutral-600);
-  }
   .border-slate-800 {
     border-color: var(--color-slate-800);
   }
@@ -614,15 +624,15 @@
   .bg-red-600 {
     background-color: var(--color-red-600);
   }
+  .mask-repeat {
+    mask-repeat: repeat;
+  }
   .p-1 {
     padding: calc(var(--spacing) * 1);
   }
   .p-2 {
     padding: calc(var(--spacing) * 2);
   }
-  .p-8 {
-    padding: calc(var(--spacing) * 8);
-  }
   .px-3 {
     padding-inline: calc(var(--spacing) * 3);
   }
@@ -635,10 +645,6 @@
   .text-center {
     text-align: center;
   }
-  .text-2xl {
-    font-size: var(--text-2xl);
-    line-height: var(--tw-leading, var(--text-2xl--line-height));
-  }
   .text-sm {
     font-size: var(--text-sm);
     line-height: var(--tw-leading, var(--text-sm--line-height));
@@ -654,15 +660,15 @@
   .whitespace-nowrap {
     white-space: nowrap;
   }
+  .\!text-red-500 {
+    color: var(--color-red-500) !important;
+  }
   .text-accent {
     color: var(--color-accent);
   }
   .text-black {
     color: var(--color-black);
   }
-  .text-neutral-300 {
-    color: var(--color-neutral-300);
-  }
   .text-neutral-500 {
     color: var(--color-neutral-500);
   }
@@ -690,9 +696,16 @@
   .uppercase {
     text-transform: uppercase;
   }
+  .underline {
+    text-decoration-line: underline;
+  }
   .opacity-0 {
     opacity: 0%;
   }
+  .outline {
+    outline-style: var(--tw-outline-style);
+    outline-width: 1px;
+  }
   .filter {
     filter: var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,);
   }
@@ -719,18 +732,6 @@
     -webkit-user-select: none;
     user-select: none;
   }
-  .\*\:text-center {
-    :is(& > *) {
-      text-align: center;
-    }
-  }
-  .\*\:not-print\:p-2 {
-    :is(& > *) {
-      @media not print {
-        padding: calc(var(--spacing) * 2);
-      }
-    }
-  }
   .group-hover\:text-black {
     &:is(:where(.group):hover *) {
       @media (hover: hover) {
@@ -1024,7 +1025,7 @@
     border-width: 1px;
     border-color: var(--color-neutral-800);
     transition-property: color, background-color, border-color, outline-color, text-decoration-color, fill, stroke, --tw-gradient-from, --tw-gradient-via, --tw-gradient-to;
-    transition-timing-function: var( --tw-ease, var(--default-transition-timing-function) );
+    transition-timing-function: var(--tw-ease, var(--default-transition-timing-function));
     transition-duration: var(--tw-duration, var(--default-transition-duration));
   }
   input.btn, select.btn {
@@ -1138,6 +1139,11 @@
   syntax: "*";
   inherits: false;
 }
+@property --tw-outline-style {
+  syntax: "*";
+  inherits: false;
+  initial-value: solid;
+}
 @property --tw-blur {
   syntax: "*";
   inherits: false;
@@ -1210,6 +1216,7 @@
       --tw-border-style: solid;
       --tw-divide-y-reverse: 0;
       --tw-font-weight: initial;
+      --tw-outline-style: solid;
       --tw-blur: initial;
       --tw-brightness: initial;
       --tw-contrast: initial;
diff --git a/Backend/templates/timeComponents.templ b/Backend/templates/timeComponents.templ
index 7f2d066..e551102 100644
--- a/Backend/templates/timeComponents.templ
+++ b/Backend/templates/timeComponents.templ
@@ -77,10 +77,13 @@ templ newBookingComponent(d models.IWorkDay) {
 
 templ bookingComponent(booking models.Booking) {
 	<div>
-		<p class="text-neutral-500 edit-box">
+		<p class={ "text-neutral-500 edit-box", templ.KV("text-red-500", !booking.Valid) }>
 			<span class="text-black group-[.edit]:hidden inline">{ booking.Timestamp.Format("15:04") }</span>
 			<input disabled name={ "booking_" + strconv.Itoa(booking.CounterId) } type="time" value={ booking.Timestamp.Format("15:04") } class="text-neutral-700 group-[.edit]:inline hidden bg-neutral-100 text-sm px-3 py-2 cursor-pointer"/>
 			{ booking.GetBookingType() }
+			if !booking.Valid {
+				fehlerhafte Buchung, wird nicht zur Berechnung verwendet!
+			}
 		</p>
 		if booking.IsSubmittedAndChecked() {
 			<p>submitted</p>
@@ -89,10 +92,10 @@ templ bookingComponent(booking models.Booking) {
 }
 
 templ workdayComponent(workDay *models.WorkDay) {
-	if len(workDay.Bookings) < 1 {
+	if workDay.IsEmpty() && !workDay.IsKurzArbeit() {
 		<p class="text group-[.edit]:hidden">Keine Buchung gefunden. Bitte Arbeitsstunden oder Grund der Abwesenheit eingeben!</p>
 	} else {
-		if workDay.IsKurzArbeit() && len(workDay.Bookings) > 0 {
+		if workDay.IsKurzArbeit() {
 			@absenceComponent(workDay.GetKurzArbeit(), true)
 		}
 		for _, booking := range workDay.Bookings {