Hi there, I need a bit of help.

I've been hacking for a while, but whenever I give a character a new MotionEtc.Pac, and later want it removed, it seems like the changes are permanent,. I have Mario, who recently had the SMBZ moveset. I just restored his original MotionEtc.Pac, hoping to get his original moveset, but when I try to Up-B or any move that was recently edited in the last moveset, it freeze him into a T-stance. This has happened to other characters as well. My only fix was to get a different customized moveset.
\Does anyone have suggestions or a solution to this issue?