Don't know if this has happened to anyone else but on Nov 13, 2012 (after Update 16) when my fvs gained enough xp to make level 20, I was reduced back to the previous base level. I was level 18 at the time and holding level 19 (in order to continue with some lower level quests) but when I attained enough xp for level 20, I was reduced to the base level 18 in experience. That's TWO levels being wiped out!!! I filed an in-game report but GM said they can't do anything about it and file a bug report instead. No response yet.