Update app.py

app.py

@@ -184,7 +184,7 @@ def display_orders(username):
         orders = sheet.worksheet(PURCHASE_ORDERS_SHEET).get_all_records()
         orders_df = pd.DataFrame(orders)
         orders_df['timestamp'] = pd.to_datetime(orders_df['timestamp'], errors='coerce')
-        orders_df = orders_df.sort_values(by='timestamp', ascending=False)
+        orders_df = orders_df.sort_values(by='timestamp', ascending=False).reset_index(drop=True)
 
         order_list = [format_order(order) for _, order in orders_df.iterrows()]
         session_state.clear()