Let's see if I understand what's supposed to happen with Volume Leveling enabled:
1. Add several albums to Playing Now and shuffle them. When played, all tracks should have Volume Leveling applied equally with no consideration of albums, as they are all shuffled.
2. Add a full album, in order to this same mixed list of songs. Now all of the original tracks from #1 will play Volume Leveled per song as before. But when it gets to the new Album that is sequentially listed, Volume Leveling should be applied across the album as a whole, preserving track to track volume level differences. So just one Volume Level adjustment applied to all of the tracks in that Album.
3. Go back to #1. Add 2 tracks from an album. Say tracks 4 and 5 (sequential tracks). When it gets to these tracks 4 and 5 how are they leveled? Individually, or as a whole album? I.E., one volume leveling for each track, or one volume leveling for the pair of tracks?
If #3 turns out to do volume leveling just like #1 (one per song), then simply shuffling your "mix tape" album should level the songs individually.
I have no idea what the answer is, but I've wondered how MC deals with #2 and #3 for a while now. I think I'm right about #2, but I'm not totally sure.
Brian.