Having the same issues with the XBOX 360 version of the game. I have noticed after some testing that the "exp" gained was somehow saved. I am allows geographically back at an older save, but my experience is saved. I noticed this by leveling up to 28 and then having the save/load problem. I loaded up a save from about 15 minutes prior that was a level 27 and I was back geographically but I was at level 28.
