I still don't understand this aspect of the Soloist: how do you know what is where?

I like to make songs with lots of choruses, and a solo every other chorus so I can practice comping behind different instruments alternating with practicing my own soloing. A week later and I can't remember what I put where. Is there like a table or something that shows who's soloing where, what instrument, how long, etc?

Whatever's in the soloist slots in the mixer seems to have a random relationship to this question. If I write ten solos, one of which is trombone, maybe it says trombone, maybe it says something else. If I then erase them all, and generate ten new ones, none of which is trombone, it still says trombone. You can listen to a hundred bars without a peep from a trombone, and yet there it is, "Trombone" in bright yellow. I don't get it.