Hello AlamoBrent,
Thank you for reaching out in Apple Support Communities. We understand there's duplicate playlists in the Music app on your Mac, which unexpectedly reappears after it's been deleted. We'll be happy to help.
To help troubleshoot this behavior, we recommend to restart your Mac in safe mode. This helps to perform a basic check of your startup disk, deletes some system caches and more. Once you're in safe mode, please restart your Mac as normal and let's remove the duplicate playlists in the Music app. From there, please let us know if you continue to experience the same behavior. If needed, here's how to perform each step:
- How to use safe mode on your Mac
- Find duplicate items in Music on Mac
Kind regards.