I placed a bunch of car splines several places on my current layout. I did this a few days ago. Today, I went to move some of them, but they are frozen....I cannot move them or delete them. But, only in one area. Elsewhere on the layout, I can move or delete them. In the area where they are frozen, I can put additional ones down, move and delete them, but the ones that are already there are frozen. Any ideas on how to delete or move them? I did an extended database rebuild, I tried deleting the parking lot and the asphalt beneath the splines...they deleted but the car splines remain frozen.