If it doesn't cause you any discomfort, I wouldn't worry too much. We all have our physical pecularities.

Is your seat high enough? Mine is high enough that I don't think I have enough slack to loop. But on the otherhand, I haven't been taped, so my knees may look like a kangaroo's for all know. I think riding clipped also enforces foot and therefore knee position.

Random ramblings,