Linked staff does not work with percussion
If you 'add a linked staff' to a percussion staff, when adding or removing notes on either of the two linked staffs, the notes are added or removed from both staffs, and it is impossible to have a different 'drumset' on each staff.
Edit: nevermind i realise how it works now
Comments
For the record:you just discovered the difference between a "linked" staff and an ordinary one :-). The linked feature is really intended for guitar and similar instruments where you might want one staff in standard notation and another in tablature, both showing the same music.