Do you have an imported MIDI file in some songs, where it might have its own patches?

About the "curious issue in the "+" dialog", yes, I've seen that in the other Roland patch maps. Whoever made and named the patches, or alternatively, whoever made the patch map, chose to call certain patches member of a group a family. Some make sense; many do not.

My alternative: I edited a copy of the patch map to copy those instruments I use all the time to my own groupings at the top of the patch map. It's just a text file, and it's OK to have a particular patch appear more than once in the file. With mine set up in groups named Acoustic, Electric, and Horns, I can almost always find the patch I want at the top of the list.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.