I have a Revit file of the Arch plans linked to my Fire Protection design. My plan views show two sets of grid lines (see image below). I have confirmed that both sets of grids are the in Arch file. When I turn off the visibility of the Grids under the Annotation tab for the Arch background, both sets of grids go off. I have changed the Annotation scale of the view and both sets of grids adjust in accordance with the change. When I open the Arch file alone, I do not see two sets of grids in any of the views I checked. Any suggestions?