I stole a horse from a stable so I could go from Skingrad to Kvatch to find Martin. So I had a 250 gold bounty. I returned to Skingrad for supplies after closing the Oblivion gate. I left the horse in a spot away from the stables so that I could get back to it without anyone seeing me. I took the horse again, and nobody saw. After taking the horse a second time, I specifically checked to make sure my bounty hadn't gone up. It was still at 250.
So I go to Kvatch. I do the Battle of Kvatch, and I grab Martin. We are on the road between Kvatch and Skingrad (I can't fast travel because I am a vampire and it is currently daylight hours) when a passing Imperial Legion Soldier stops me - and it says my bounty is 2250!! I'm thinking to myself "For what???" as my bounty was 250 before the Battle of Kvatch, and I did nothing that would get me a larger bounty.
I'm going back through some further saves... my farthest save back is in the chapel house, just before you storm the castle. My bounty on that save is 1250. So somewhere in the initial assault of Kvatch, I got 1000 gold added on to my bounty, and somewhere in storming the castle, I got myself another 1000 gold added to the bounty. Doing the Battle of Kvatch gave me a 2000 gold bounty!
Does anyone know what may have caused this?