As I read your post, it's the cleet that's "crammed", not your foot. But if your foot is crammed, then that is definitely a big part of the problem. Any activity shoe (well, with some exceptions such as ballet or rock climbing, but no exceptions for bike shoes) should sit well back at the heel -- no slipping and sliding that would create blisters -- but should leave you plenty of toe wriggle room out in front. The cleet, i imagine, should sit so that your pedal is where you want it, where you can apply pressure with your whole foot sole. So if you feel the cleet is crammed too far forward, then maybe moving it would help.