The first time I rezzed a house, and it was one with the rezzer box, I rezzed it on top of a platform that I was using to nivel the ground. So the rezzer box went beneath that platform, and I never thought of looking for it, so I edited the house and the doors went the other way
Then I decided to unlink it so that I could link the doors, bad choice, because I had very little experience with that. The house was mod and no copy (now I know better than to buy like that). Lets say that I ended with something really odd, and had to buy another one.