When turning on condensing, two trombone parts will share stems for most of the score, but occasionally will show up and down stems as if something is different. The two parts never cross in the piece. Trombone 2 always stays below or unison with trombone 1.
I’m not able to figure out how to fix it. I am assuming there is some hidden difference between those two measures in the example, but I can’t find it.
Is there a quick check of some setting that could possibly be forcing the up/down stems in these bars, yet not in others?