So I beat dawnguard sided with the vamps. Doing the quests so I can turn more and more people into vampires. Decide to take a brake from those quests to work on leveling my vampire lord. After I purchase my last vampire lord perk I head back to the castle. Ask the first person I see what I can do to help. They say, go talk to "such and such" and they have the quest marker above them, but no dialog for any quest. Everyone I talk to wants me to talk to the same broken person. Any known fixes or work around? Or deleting to an older save about all I got?