Last night I was still able to repeat the Train to Zone! quest in The Hedge Hollow. Suddenly this morning it is no longer repeatable, and in my quest journal it is also not tagged as repeatable. Did I miss an announcement or is this a bug? I've sent in the in game bug report. Anyone else encounter this?
Maybe never mind? As soon as I slew Altius Volfban and completed A Nightmarish Return again, I was able to talk to the gnome to start Train to Zone. Didn't have to do that before. I'm going to try it again with an alt and see what happens.
At this point I believe the problem was I had not quite reached the 18 hour time limit. Seems to be working fine. However, it is not tagged Repeatable in the quest journal, but my bug report will hopefully be added to the list.