I've got the forward pressure about right on my bindings I think, but there seems to be some vertical slop in the binding. Like when just on the table the boot seems to be almost resting on the brake pad and if I pull down on the boot the binding lowers down and the brake pad goes all the way down and it seems like the forward pressure gets a little looser. Yet I can't seem to tighten it up so much that there is no up down movement in the heel, is this normal or am I doing something wrong?