Bee behavior with nests

When setting multiple bee nests/hives, the bees assigned to one nest go into another, displacing one of the bees already assigned to that particular nest. I had 2 of the 3 bee nests/hives at full capacity and the 3rd nest at partial capacity, and the bees performed this behavior. The spot is taken by another bee whenever a bee leaves the nest, which simulates a not at capacity nest. They are expected to assign themselves to a nest that has partial/no occupancy rather than stealing a spot from the other bees. They also do not assign to nests/hives when they are empty or reassign themselves to other empty bee nests/hives at random rather than staying with their initial "home" nest