Please note that I do NOT know how this is being done, but apparently there are at least two bugs in AC that allow groups to do multiple paths without resetting the dungeon. One lets the group “skip” over to a second path after the first is completed. The other somehow activates all three NPC’s at once. I have reason to believe that this is being exploited regularly.
Corwin Grimjaw: Guardian (80)
Yak’s Bend Server
Crimethink [ct]