First, have someone look at the bar on your shoulders. Make sure it's centered. You'd be surprised how many folks take an even width grip and then duck under the bar and get off an inch or two because of wrecked shoulders or poor mobility in general. while on mobility, This could be a mobility issue; I.e tightness in your glute, glute medius, hamstring, quadratus or tfl etc.; Or it could be strength issue, that your right side is stronger and so you're favoring it.
Either way, a mobility session would do us all good.. I'd also search for the Neanderthal no more series right here at T nation by Eric Cressey and Mike Roberts, and also thrown in more single leg work to help identify any flexibility issues and balance any strength differences. Also look up DeFranco's agile 8 or Limber 11. There is also a remote chance that there is a leg length discrepancy, but I'd err on the afore mentioned items as the culprit.
Hope this helps.