David, first, thank you for your work and continuing interest in Music XML.

If I follow your first paragraph correctly, the Music XML is being produced accurately; it's the way BIAB handles this that is in need of examination. I'm just guessing, but what you describe sounds like a description of how mouse-based data entry works in BIAB, which many of us particularly love over how this is implemented in other software. Of course, we see threads periodically in which someone who doesn't understand asks how to do or not do a tie.

I hope PG Music continues to work on exporting Music XML not just for Sinsy. I only request that it not change the data entry method, assuming I am even correct it's related to what you describe.

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.