No you're actually right Brigadeer, people tend to stay around familiar places, and I never thought that they might be people that had been in the house before I moved in, just looked out at the graveyard one day, and though okay, fair enough.
My niece was about two, and she told her mother, about when she was with her other mummy, and when questioned further, described the other house completely, in sufficient detail that my sister was able to find it, but they'd never been there before.