So on the rollup tag values, yeah it is a "feature", but I debated whether i would add it into non-soup playlists or not. I'll make that an option.

As far as sorting, you should probably use Playlist Properties=>Set Sort Tag instead of Set Playlist Order. I'll check out Set Playlist Order and see what it might be doing. Incidentally, I don't think Set Playlist Order ever supported secondary sort keys (at least I didn't write support in -- you may have been able to do some trick to make it happen ,but it was definitely a side-effect).

When you say you get a difference sequence than what's displayed -- if you set playlist order on a genre sort, then sort by "position", is it sorted by genre or just totally random?