I have narrowed down the problem, but still no idea why it's happening. It seems to happen with any songs using style ZZBOSSA, which are saved with file suffix MG4. In addition to the two new songs we are working on with the problem, I realized we have one other song with that style that we have been using for backing for some time with no problem. Turns out it DOES have the same problem. When the song is finished playing, or is stopped, the volumes do reset to 90. But as long as you don't resave it at that point, all is okay the next time you open it. Only problem is when you're working on volume settings for a new song. Basically, you have to adjust volumes as you want while the song is playing, then note down those volumes; because when the song stops, they go away! Then you reset those levels and save it before playing it. Strange and annoying! I'm wondering if others have seen this problem with this particular style, or with others?