Derrick, It depends on body type - some people have that issue, others don't. More adjustability in the rigging would be a good thing, but for the price it is still a great pack.
I had the same problem you did when loaded with significant weight. (I never noticed it while carrying normal loads) What I ended up doing is taking the frame out and wrapping foam pipe insulation around the spots that needed it, and then wrapped the insulation with electrical tape. That solved it for me, and had no issues after that. Give it a try.