Harp pedal diagram appearing on various parts

Hello,

I just installed the harp pedal diagram plugin on my Mac. A problem has occurred where I add the diagram to the harp part and it appears in other parts as well. Not only does it simply appear in the other parts, but it somehow links them, so any edits made in one part affect the others. It looks like the top line of the harp part is linking to the trombone part and the bottome line is linking to the cello. Any thoughts? I will attach an image as well.