Hey there! I know this is like 3 years later (and hopefully the problem is sorted!) but have you tried OneTrack?
onetrackapp.com
It lets you have complete control over your playlists and is designed especially for stuff like dance classes and performances
Hope this helps.
I have been searching for answers for the same thing as I listen to a meditation program at night where I have different stages in playlists and can only listen to one as I fall asleep. So it was driving me nuts not being able to have it stop after the one meditation and there are too many to just do individual playlists and its an exact program so that would have made it difficult to follow properly.
So Thank You for this answer! The app I found is One Track Mind by Benjamin Pung for .99 cents. I just tried it and it does exactly what the OP and I need! That's exactly what it was designed for!
So again, Thanks!