Playback Technique Editor working/not working

Hi,

I have 2 questions regarding the PT editor:

  1. Why will it not let me access the edit window from the pencil icon in the right menu panel?

  1. After I’ve duplicated a PB several times & given them unique names & checked the star for each one & saved them + save the project file, Most of them keep disappearing. Dorico only seems to allow me to duplicate, edit, save one PB at a time.

Why is this? What am I missing?