never noticed it myself actually, but I think it might be that I'm leaning slightly towards the left side of my right foot, so that the right side is raised a little. whatever it is, this stance is not perfect taekwon-do- wise.
You're absolutely right of course. hand-guards were never my strongest point. my upper body is also a little too bent, if I am to nitpick. Thanks for the comment. You seem to know a thing or two, have you done martial arts?