I'm not sure if it is just me but the quest Touching the Sky will not start, setstage, startquest, will not work either and I'm pretty sure it's because of the same reason of this bug here...
- This quest may not start on completion of Recipe for Disaster.
- Setting the stage through console does not work as the stage always remains 0. The cause of the bug is currently unknown, and the easiest way to overcome this bug is to skip the quest entirely. To do this, move to a location away from the Dark Brotherhood Sanctuary, and use the console commands completequest db09 followed by setstage db10 10. This immediately starts you on the following quest
I got that from UESP, and it's obviously not a bug with DG but it's the same thing thats happening with my DG quest, I read the Elderscroll the quest said "Quest complete" and then this quest didn't start, the vampires came into the area and attacked us and it said in my journel "I've read TES it showed a cave I should make haste there." and the quest didn't start, I can even go there and that Snow Elf is nowhere to be seen.