Wanted to make sure that I wasn't going crazy.
I've got a appearance attached to several bodies. Going in to edit the appearance and remove two of the bodies and clicking "ok" causes the appearance to double in the "Appearance Manager". Then I have to then RMB click on that and remove it. So it seems like the program takes it out of the original one and just makes a duplicate of it again since it was removed from the selection box.
If anyone can confirm this before it's submitted, it'd be much appreciated.