Erase iCloud Music Library contents to solve playlist duplicates and other problems?
I was looking forward to Apple Music, so of course I signed up on June 30 and bought a family plan with the 3-month trial. I updated my devices to iOS 8.4 to use Apple Music, and updated my iMac's iTunes application to 12.2. So far so good.
Then, I turned on iCloud Music Library on all 3 devices. Bad idea.
First, I found a majority of my playlists had been duplicated, triplicated, or quadruplicated. For example:
Mozart
Mozart1
Mozart2
Mozart3
The contents were the same, but now I had three times as many playlists in iTunes and on my devices.
If the playlist's name originally ended in a number, the renaming was funny:
Level 42
Level 43
Level 44
Level 45
This was a nuisance, but then I discovered the contents of several playlists were missing songs, or the order of my songs was out of order. This was a bigger problem. I had deleted all the duplicate playlists in iTunes on my Mac, but I wasn't about to reconstruct all the messed up playlists. At least I didn't notice problems that some other people had reported, like wrong album artwork, iTunes playing the wrong song/artist, corrupted metadata, DRM added to songs without DRM, etc.
I turned off iCloud Music Library on all my devices, but the problems didn't get fixed there. I had to restore the previous iTunes Library.itl file in the iTunes folder, then relaunch iTunes to get everything back the way it was. Then I had to sync my devices to iTunes, and they were likewise restored to their former state. But I lost iCloud Music Library functionality, limiting what I could do with Apple Music. Couldn't save music to my device without iCloud Music Library enabled, for example.
The next day, I turned iCloud Music Library back on, just on my iPad. The same problem reappeared--duplicate playlists, wrong contents. I turned iCloud Music Library back off, synced to iTunes, and back to normal.
I figured iCloud Music Library must have stored my playlists (and music) and when I turned on iCloud Music Library the last day. I guessed when turning on iCloud Music Library on several devices, the playlists from those devices got copied to the iCloud Music Library, creating duplicates or worse. The next day, choosing to MERGE the data on my iPad with the iCloud data, it created duplicate playlists, and when the iCloud Music Library had more than one playlist with the same name from the previous day's debacle, then I would see triplicates or quadruplicates. Doesn't explain why some playlist contents changed, though.
So then I thought that things might work properly if I were able to wipe the iCloud Music Library clean and start from scratch. But there is no clear way to do this.
I tried to erase the iCloud Music Library by doing this: I renamed my iTunes folder to something else (so I could get it back later), then opened iTunes again and turned on iCloud Music Library. All the playlists (and duplicates) and songs were automatically populated. Then I deleted all the playlists and songs, and when given the choice, I chose to delete the same data from the iCloud Music Library. I turned off iCloud Music Library, quit iTunes, then about 45 minutes later, I went to my iPad and turned on iCloud Music Library. Same problem, with maybe fewer duplicated and triplicated playlists, but still some playlists had the wrong items or items in the wrong order. I turned off iCloud Music Library, and on my Mac went back to the previous iTunes folder. Launched iTunes, synced the iPad, back to normal again.
My question: How can you reliably and completely clear the contents of the iCloud Music Library? if I can do this, I might be able use ONE of my devices with the iCloud Music Library without creating duplicates and messed up data. I am suspicious, though, that adding second and third devices (including the Mac) will cause the same problems again. In the meantime, I cannot use the iCloud Music Library, which limits the usefulness of Apple Music.
Apple needs to make this iCloud Music Library more intelligent and reliable, without creating problems for people with more than one Apple device.