everyones feet are different including your own. my feet for example one foot is a whole shoes size bigger than the other.
just because you tighten your left strap six notches does not automatically mean your right one will be fine at six notches for example
so first things first tighten your right binding up a bit tighter but not so it is painful.
if you cannot physically tighten it any more because you have run out of binding wear bigger shoes such as a walking boot style. These are stiffer by nature and so will hold your foot better. If you dont have bigger shoes add and extra pair of socks it amazing the difference a thick pair of socks can make
if all this does not help get someone else to check your bindings your mind can play tricks on you and make you think something is wrong when it is not just because the sensation is different to normal
finally sometimes your bindings get looser after walking around a bit as your feet and shoes settle so just tighten then up a notch or two nearly everyone has to do this when they put them on
good luck
