so I have a problem w/ the multiresolution modifier

I’ve been sculpting this raptor

and in the little multiresolution menu, I changed the sculpt from 2 to 3

and then this happened

so I changed it from 3 back to 2, and it got even worse. If I keep going back and forth, that thing keeps getting bigger.
What’s the problem here?

Dammit that happened to me to, if yo have solution would you mind sharing it, how you resolved it? This is a serious issue for blender if you sculpted a lot th multires, i tried some methods but they are not helpin my situation here is a link i found it didnt really help me but i hope this soves your problem.