I have noticed several times now that if I pull a mob from the dining area in Seb, or Froggy room, or Armsman room into the room where the Repairer and Chef spawn I get several mobs from the crypt area. It tends to be a few skeletons and 1-3 beattles.
It is not a big deal for me, but I bet the people watching their mobs take off running half way across the zone are like WTF?