Im at the end of the first waypoint. There is 4 pillars here and the quest shows me I need to go... down? There are no NPCs here. I assume there is supposed to be a spectre spawned here that I am supposed to talk to?
Is it bugged or did I miss out on something I was supposed to do?
see if http://www.rarityguide.com/articles/articles/2795/1/Skyrim-Dawnguard-Vampire-Lord-Walkthrough-Part-22-Darkfall-Cave/Page1.html helps maybe you missed some step