Are there any known predictable ways in which the XML import problem happens? I just imported a score (for smallish musical-theater orchestra) via XML. Most of it imported brilliantly – bravo to all concerned – but the brass staves remained stubbornly separate: Horn by itself, two Trumpets with a primary-level bracket as if they were a whole family, and Trombone by itself. I kept examining, even changing, the type of instrument for each, and they all seemed to be correct, but nothing ever changed. (Well, I also needed to change from Horn without key signature to with, and that needed more than one try but it eventually worked.)
The only way I found to rectify it was to create four new staves for the needed brass instruments at the bottom of the score (they automatically bracketed as desired), copy the music onto them, then delete the old ones and move up the new ones. I’m just wondering if there are steps I can take in advance to try to forestall this situation, or does it happen unpredictably?