While leveling my EW build near Necropolis, I walked away from my game only to come back and find it was frozen. I exited out and entered again. When I did, I found that my character had leveled twice in less than 30 seconds, having not fired the first shot or killed anything.
The levels were very real, as in I had the full amount of skill points to distribute as well as a new perk (lvl 18 now).
I just figured someone would want to know about this bug.