I have one of my households in a house that had a lot of similiar problems. SO much of the house was built with bb.moveobjects on.
Even after I got all of the routing issues fixed (or so I thought) a new one can still crop up now and again. They've been in the house for over 13 sim weeks now and just this morning I had one of them get stuck in the bathroom. For some reason the bathroom door, which hadn't been a problem all this time, was no longer useable by the Sim inside the bathroom.
When I went into build mode to fix it I discovered that it had been centered on the wall with bb.moveobjects and wasn't at a grid snap point. Why it had been working fine until today, I have no idea.
