I never changed the background, Also the background I have gives me a might bonus. I also remember being able to meet a int check of 20 with my character (17 base + 1 (godlike) + 2 from an item) in one of the dialogues I was in. But now my Int is 19 (16 Base + 1 Godlike + 2 From an item). I am also fairly certain that I had an 18 Might and 18 Int when I started the game because I remember commenting that I thought it was funny that my wizard had both the highest Might and Intellect in the party.
Also when I calculate my base stats from my character sheet it adds up to +14 instead of +15 (over 10). I have also noticed that an other character, the NPC Druid (Can't remember his name), has a base of +14, and an other character, Durrance, Has a base of +16. I can't really speak to the NPCs if that is normal or not I just thought it was interesting. It just seems like my characters stats have shifted a little bit.