I just recently installed Dawnguard. After installation I proceeded to finish up raiding a certain dungeon before heading to Falkreath to sell my loot. When I arrive at Falkreath, I see Durak standing near the entrance to the city. It appears that he is trying to walk towards me. However, he is continuously respawining over and over again, making it impossible for him to move. I know he is respawing because if I attack him, his health immediately replenishes, and if I kill him with console his body immediately disappears and he respawns again. This also makes it impossible to interact with him and talk with him to start the Dawnguard quest. How do I fix this? I can find no mention of a bug like this on the forums or through any of my searches.