Replying to Are my k2 flex boots too big?

I was at the store and they said I was between two different sizes but they sized me up from my normal size because you do that with the k2? The toes did not feel snug before heat molding but when I tried my usual size they felt too tight but maybe that is because it was before they were heat molded? With the k2 I have right now when I tighten it and lean forward on my skis, my heel comes up inside my boot but when I lean back it seems okay. Maybe because I need to put it tighter? I just haven’t done that because I’m sore I think it’s because I tightened my boots so much my first day riding in forever and I did not stretch or anything. Only my right foot kinda hurts because I pulled something I think. I’m not sure if that has to do with the boot though because I pulled that same muscle on my old ski boots.