We are also having the same issues trying to get the escape artist title, we have tried everyone running, we have tried just a few people running, we have tried doing it as fast as possible with a few OP guys and we have tried it slowly with a full group. I have timed it every time so i know for sure were making it within the time frame but i cannot seem to get the title. also for some reason the alarms have been resetting their selves, like for example last night after we turned off the second set of alarms we had a guildie want to join us so we invited him and he came in, mid ways through running up the ram to the second boss the alarms turn back on and he died before he could make it to the door. i'm guessing that would be a glitch but i don't know, as for the escape artist title we just can't seem to make it work. and i have used the check option in the title interface which also did not work.
The alarms in DL seem to bug a lot. Usually it's second alarms that do it, too, but I've seen first do it also.
Usually, you know they're going to bug when the "Oh no they actually shut them off!" message keeps repeating and they keep making the alarm noise long after they should have stopped.
If that happens, what I usually do is hurry everyone up and get them past the alarm point, and tell any latecomers to just wait til after we kill second boss- then they can come in and crystal past the alarms safely.
As for getting the title, when all else fails, try dying. You can get the title when you're dead, so try swapping your gear right at the ramp at second alarms. After your party starts running and the alarms go off, aggro one of the big red guys there in that hallway (have them save one for you), and die.
If they can get the alarms completely cleanly (they don't have to be fast, but it helps to be clean, ressing slows things down too much), you should get your title as soon as they turn them off.
If even that doesn't work, I think I would put in a ticket.