I've noticed on my past 2 playthroughs, I was not given the option to extract blood from corpses during the quest. I go to the usual corpses in Alftand, but I only get the loot option. The only thing different about how I'm playing the game between these last 2 playthroughs and my first few was that I sought out this quest independently of the MQ (wherein you will have to get the Elder Scroll anyway) on my last 2 playthroughs.
Whenever I triggered this quest as an adjunct to the MQ, I was always able to harvest blood. The only other difference has been the patch numbers - as new patches are available, I implement them, so I've probably played through under 4 or 5 different patches, therefore I doubt that's the issue.
I am able to use the console to basically skip the whole blood harvesting step (setstage da04 50), but I'm concerned as to why it's happening at all.
Is anyone else getting this, or does anyone know why this happens?
Thanks.