diff --git a/app/main.py b/app/main.py
index 9bbf810..14ca1da 100644
--- a/app/main.py
+++ b/app/main.py
@@ -26,7 +26,7 @@ def format_datetime(value, format="%d %B %Y, %H:%M:%S"):
         date = datetime.fromisoformat(value)
         return date.strftime(format)
     except Exception as e:
-        return date
+        return value
 
 
 statuses = {
@@ -180,9 +180,9 @@ async def deal_tab(
         task_data_json = task_data.json()
         result = task_data_json["result"]["tasks"]
 
-        while len(task_data_json["result"]["tasks"]) == 50 or len(result) > 50*4:
-            limit = ((len(result)//50) + 1) * 50
-            task_data = requests.get(get_task_hook + f"limit={limit}")
+        while len(task_data_json["result"]["tasks"]) == 50 and len(result) < 50*4:
+            limit = (len(result)//50) * 50
+            task_data = requests.get(get_task_hook + f"&start={limit}")
             task_data_json = task_data.json()
             result += task_data_json["result"]["tasks"]