User blog comment:Bowser32/I have a problem I can't figure out/@comment-4661596-20140517233640

one thing that used to trick me was corruption or crimson underground below the housing where you may not see it, but its close enough to invalidate some of the rooms. If you have a clentaminator, you could try shooting it through the ground, or even dig around down there and removed the corrupted blocks if there are any.