Another related issue I've been having is that for playlists sorted by date added, when syncing to my phone, the songs in the exported playlists do not appear in the same order as they are in musicbee. I have to always do "List" > "Update play order" before starting the sync, which obviously I forget every time.
Adding tracks on top could be implemented to actually insert them on top in the real list, not just change the way it is displayed. That would solve this issue as well.