iOS devices not syncing

Enabling iCloud Music wrecked my existing library (see other thread) but thankfully I have a backup of it. Anyways, I still want to use Apple Music and iCloud Music, so I started with a brand new iTunes library and began experimenting. I add music to my library (either from Apple Music or files on my hard drive) in iTunes, or create or update a playlist, but it's not updating my music on my iPhone or iPad which both have iCloud Music Library enabled. The only way to force it to refresh on my iOS devices is to turn iCML off and on again, which is not a solution. The way I understand it, it's supposed to be completely automatic and rather instant. Anyone else having this issue and solved it?