I have played multiple characters since November of last year and have done the quest http://www.uesp.net/wiki/Skyrim:The_Man_Who_Cried_Wolf numerous times. Last night
I experienced a first. I was standing on the outlook at the end of the cave. I am playing a Ranger (level 36) and I still have Lydia alive and by my side. I was looking at the keep with the blue swirling light and started to let fly the arrows at the targets visable on the keep platforms and the grounds below. I could slightly see the necromancers at the top of the main building so sent a few arrows that way as well. I all of sudden got the message that I finished that quest and needed to return to Solitude for my pat on the back. I looked back to make sure Lydia was still at my side and had not gone solo into the keep, she was still there. I went down and inspected the rest of the cave. Except for one lone draugr in the back of a passage way inside the keep they we all gone and ash piles were everywhere with a littering of the undead. Either the game decided that I was good and could go home or I landed several increadable shots. Has this happened to anyone else on this or any other quest?