I wrote a small piece for trio (piano, cello and violins) and placed chords in the piano grand-staff.
Then I wanted to copy it for orchestra. I copied the notes in the Piano, Violins I and Cello staves, then I selected the chords and copied it on the orchestra’s piano staff. What happened is that the chords appears also in the Marimba and Double Bass staves too. If I select a cord on Double Bass to delete it, it will be deleted on the other staves too.
What I’ve done wrong?