Creatures Caves

My migrational feral run has been running for quite a while now, and just by chance one of the Norns succeeded in finding the teleporter into the Norn Meso. However as soon as she arrived she began eating almost everything in sight even though she wasn't hungry, and she completely refused to use the elevator.

I added a male Norn to the meso and left the game running. When I came back, I found a load of Norns backing towards the left corner of the room, near the holistic learning machine, as if they were crowded. However, this behaviour constantly carried on, even if I moved them.

Does anyone have an explanation for this odd behaviour? I must mention the Norns live in the Biodome which is set up so they must "migrate" to find a food source. Could this be an explanation for the constant eating and retreating into the corner?

I've attached a copy of one of the Norns' genomes to analyze here.