I have about 6 studs on the part file. When I use male/female standoff to finish the assembly all of these who up on the face of the part. I can't show this on the drawing so I suppress all of them. After I rebuilt, the circle show below disappear but all of my studs are no longer in the position where they should be. They float in the air. What happen? I can't undo now. Please help. Thanks