Hi Steve
The forum isn’t letting me upload, so this is the best I can do. The file is attached to the post below.
If the file is opened in Finale, the top and bottom staff content is identical for several bars. In Cubase, there are rests inserted in the lower one, with all subsequent music shoved back. It’s the same in larger scores, with the bottom staves misaligned with the top one.
Many thanks
John