ok well i'm just near the beginning of the game.

I gave yang some specialty claws (iceclaw, thunderclaw), and then he ended up disappearing after we meet levithan. Everybody is gone except for Cecil. Later, when I meet up with Yang again, he's lost all the equipment I gave him!!!! It's really annoying because I spent money on those or found them in special places and they are gone forever!!! and there is no way for me to predict when some member is going to disband unless I go through the walkthrough, which I don't want to do...