THK bonus bugged?

I've been trying to finish up a few bonuses here and there to get a title for some characters. I went to THK because it was the last mission bonus to complete for my necro. I lit the beacons, killed everything, and nothing happened. Thought maybe I missed something, went outside looking around, killed a dozen jades or so back there, and nothing. I've done this about 5 times now with henches, and I don't understand why the bonus isn't activating. Any ideas?

I know alot of you are playing factions, but is there anyone that can give me some tips or something? Last time I did this with a different character, the bonus went through like normal.

You have to light both beacons within 30 seconds. Other than that I have found that it is sometimes buggy. A guildie said once after it didn't immediately pop up that you had to go out and see the dwarves out in their camp to make it grant. But I have done it a number of times when that wasn't the case.

You'll know if you are too slow when you see the dwarves moaning about how the end is coming.