I think I figured out the duplicate problem! The Key value for those two banners were the same because I used a name describing size of ad which were the same on each side and not the same as footer. Maybe there should be some type of error check for that?

But you still can not edit the name value. If you are not allowed, maybe an error msg that states you can not change that field or gray it out when editing?

Just a users point of view.