diff --git a/modules/interfaces/interfaceDbChat.py b/modules/interfaces/interfaceDbChat.py
index cd688ca7..dfdf9886 100644
--- a/modules/interfaces/interfaceDbChat.py
+++ b/modules/interfaces/interfaceDbChat.py
@@ -909,9 +909,10 @@ class ChatObjects:
                 "actionProgress": msg.get("actionProgress")
             })
         
-        # Apply default sorting by publishedAt if no sort specified
+        # Apply default sorting by publishedAt if no sort specified.
+        # Use parseTimestamp to tolerate mixed DB types (float/string) on INT.
         if pagination is None or not pagination.sort:
-            messageDicts.sort(key=lambda x: x.get("publishedAt") or getUtcTimestamp())
+            messageDicts.sort(key=lambda x: parseTimestamp(x.get("publishedAt"), default=0))
         
         # Apply filtering (if filters provided)
         if pagination and pagination.filters:
@@ -1537,9 +1538,10 @@ class ChatObjects:
         if not stats:
             return []
             
-        # Return all stats records sorted by creation time
-        # DB uses _createdAt (camelCase system field)
-        stats.sort(key=lambda x: x.get("_createdAt", 0))
+        # Return all stats records sorted by creation time.
+        # Use parseTimestamp to tolerate mixed DB types (float/string) on INT.
+        # DB uses _createdAt (camelCase system field).
+        stats.sort(key=lambda x: parseTimestamp(x.get("_createdAt"), default=0))
         
         # Convert to ChatStat objects, preserving _createdAt via extra="allow"
         result = []