So my girlfriend wants to go clipless. I've noticed though that using her platforms, her feet go all wonky, I'm talking seriously out of whack. She pedals using the very back of her foot instead of the ball. They're also extremely angled outward.

If she went to a clipless system and got held into a position that she doesnt naturally take, would that really mess with things (ie cause injury)?

It seems to me that forcing her foot into such a position would not be good, I just need reassurance.