Briny Tower Roommate Glitch? - Discover University

@savnbea86521 Some of the Sims live there as a premade household and if you merge your household into that, all Sims in the premade household will be added to yours (just like if you add your Sim to a normal already occupied house).

If you remove them, they should still be in the household manager to move them in somewhere else.

Best is to remove the premades from the dorm prior to moving in or pick the other dorm. There's an empty one for each uni.