I just edited a login in the latest iOS build (updated yesterday 9/28) and after saving the edit I returned to the Login list. The list item for the login I changed still showed the old login information (I changed the username). I then when back to the Categories table view, clicked login again and the table view refreshed properly.
I also tried deleting a login and on returning to the table view the login continued to appear in the list until I went back and re-entered the login table view.
This is on the latest official iOS release, 8.0.2 on iPhone 6.