Quote (Dead @ Jul 15 2011 07:30pm)
Tried this then proceeded to join another party and after leaving the 2nd one I could no longer access it if the difficulty was changed.
Either way it doesn't answer the original question of how they got hellmode in the first place.
You cant rejoin a party after doing this. The thing to do would be create a level 1 alt, join a hell party, then log him out. Now you have someone who can host hell games whenever you want for whoever you want. Like Penguin mentioned Hell was enabled only briefly, these characters obviously still had their difficulty set to hell after it was removed and now can host parties allowing others to join and subsequently make their own hell games.