What's that thing called when you have two programs open at the same time where one cancels out the editing effecta of the other? I'm not sure what it's called, but basically, if you (say for example) have Nightmare open and are editing with it, to which you open Feditor and quickly make some changes, the Rom will only uh... apply(?) the effects of one of the programs whilst the Rom won't recognize the changes of the other program?
So that would mean that when you open the Rom again, you will either only have the changes made in Nightmare OR Feditor but NOT both if they were being used at the same time.
I'm guessing (by the video) that maybe the classes didn't change in the game after the -suspend- as maybe you used Feditor to insert an animation in the meantime?
Its probly not the answer you were looking for, however it may have something to do with the reason why the classes reset(?) (unless it was just a problem I experienced). Either way, I hope it help, and good luck :)