I was a hound and left to brahmin boys. Was not happy with Brahmin Boys so wanted to leave and come back to hounds. I left the faction like normal but my reputation did not reset. It worked just fine when I left the house resetting my reputation to 0. But as a Brahmin Boy it only reset the reputation with the 4 main factions. But with 2 unidentified factions, hounds and church I was still vilified at -10 000 reputation. Ran into a developer and told him the problem. He said report it on the forums and swapped me to a hound which was very nice of him. Thank you to that dev!