It sure looks like a JP issue more than anything else. You COULD try usinh spherical falloff zones - or turn them off if they're there and see if it helps. Can you post a pic of the bend JP's for the thighs? I have an idea of what's wrong...

FREEBIES! | My Gallery | My Store | My FB | Tumblr |
You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.