Score: Grand staff staves mysteriously linked, not independent.

How I got here.

1. Over time I have built the template of staves and names. I loaded this template as the basis of a new score.
2. In between the grand staves I added the first 8 bars of changes.
3. I copied that and, using the rt. arrow, moved 1 click to the right.
4. I pasted the copy, ending up with 16 bars of changes.
5. I then copied those 16 bars and pasted them onto each instrument.
6. I then went out of concert mode and back in 2 times.
7. I then clicked on the 1st bar whole rest and pressed 6.
8. The program crashed.
   I rebooted MS and was asked if I wanted to recover the previous session. I said yes.

The score came back up with the 16 bars of changes in the grand staff only, the copies had not registered.

9. I then again copied the 16 bars onto each stave, this times saving after each paste.
10. When I clicked on the first rest in the treble part of the GS and pressed 6, the program did not crash. However, both staves of that bar divided into 2 half rests.

The 2 staves are not independent.