Here's a test of one aspect: 2 simple rooms created by drawing the walls, placed 2 identical doors, with magnetism on and then double-click the room create each side. One door is exactly aligned with the wall at the edge of the room, the other has wall alongside it. The wall at the north (top) side is in fact 2 walls, must also try it with a single wall along the side. Anyhow, this one shows the problem exactly.
The door by the way is one I downloaded, file is named "puerta". I guess it most likely came from the SH3D object download page. Unlike the stock door it doesn't show the swing.
