Imported CDs turning into Apple Music files
I had a bunch of U2 albums that I imported from CD years ago. I originally put them into iTunes back in the days of music matching and eventually switched over to Apple Music. I recently went to burn a playlist but couldn't because it turned out that the files had at some point turned into Apple Music files. I reimported all the CDs, but discovered that they were still listed as Apple Music files that disappear if I sign out of Apple Music and can't be burned to a playlist. This is rather frustrating.
MacBook Pro, OS X 10.11