Hi Patty,
The XY center of mass of the SKP file is used to position the model when it comes back in, so if you edit in SketchUp add (for example) a garage, or a new wing, or something that changes the 2D footprint of the building, then it will move on re-import. There�??s not much we can do about it -> we�??d need to compare the footprint of the old feature geometry and compare it against the new feature geometry and try and �??recognize�?� which point/s haven�??t changed and then lock the re-import to that location.
Regards Gert