FFX: Shapeshifter can only change once?

[Shaboba]

I have a custom character with the Shapeshifter attribute, and all of his temporary forms have been set and work just fine. The problem is, once he turns into one of his temporary forms, not only can he not change into any temporary form, but he can't even go back to his primary form! The command just literally vanishes once he's in a temporary form. I have no idea why this is happening. Please help? =[