Okay, so how does the enemy spawn mechanics work? I recall reading that enemies only spawn on world generation and do not respawn but that doesn't seem to be the case.

For example; i head to a village, the one next to the river near spawn point. I kill every single villager i can find, i search every house and every inch of the place and nobody else is found alive but somehow, when i go to sleep in one of the houses im getting constantly interrupted by villagers screaming and attacking me. No matter what i do, i can kill them and go back to sleep but they keep coming.

So, what is happening? Are they really respawning or are they just all hiding in a closet waiting for me to go to sleep and strike me down?