Have you, or has the pose you applied, translated the hip? If you move the figure by moving the hip, the centre of rotation doesn't move with the figure. As an experiment, load Andy and move him by selecting the body, then rotate and you will see he rotates about a point that appears to me to be somewhere between his feet. Now move him back to his original position, turn off ik, select the hip and move this. Now select the body and try rotating him, and you will see the difference.