Found a bug that grants more levels at once. I was going a bit kill-happy with brimstone flasks on a Monster Zoo and got a level up. The sound effect played multiple times, but I thought nothing of it. After I assigned my skill and closed the window, the level up box appeared again. I got to assign 3 skills, each on their own. (so 1 + 1 + 1 skill points. Not 3 all at once). I think my character got multiple stat increases for leveling too (melee power went from 8 to 15, but I wasn't tracking my stats). I think I killed multiple enemies at once at the point I leveled up. I'm guessing whatever triggers level up when an enemy dies and when EXP is full triggered multiple times (since exp was still full when all 3 died, it did the "level up" event 3 times)