Trouble sync'ing with apple devices app

I've been trying out the apple devices + apple music combo on Windows 10 as the suggested replacement for iTunes. This is not going well.

1) The apple devices app is forgetting the sync configuration randomly, so it periodically strips the music content from the iphone / music app. Why does it do that?

2) It doesn't look like there is a way to add or subtract items - it looks like it surveys the Artist/Album/Genre properties and presents them rather than having me list the ones I want. I suspect this is related to #1 somehow but maybe I'm wrong.

I'd really like it to remember my choices. Is there some way to make that happen? Or can I just delete these apps and go back to iTunes.