I have added the Transformers Movie Battle for Mission City set to my list. Whenever I try to edit the set to current condition to loose and the original condition and then edit it to just Megatron (as that's what I own). It then just hangs on the auto save bar and makes no changes. I have tried several times from several screens all with the same effect.
I'm sorry if I sound like a noob but this is my first go at using the whole system and I do love it.