Whenever I buckle up into my bocks, the heel of my shoe has to be kinda pressed into place, due to the two "wires" or metal bars, i don't know what to call them, but the things that run on both sides of the foot plate. Is this normal, or should I find a different pair of shoes. This also leads to my shoes being stuck in the bock when I pull out of them, unless I pull with my heel out of them, which is fine, just seeing if its normal. Thanks.