Why does music stay on my iPhone/iPod even when I deselect it in iTunes?
I typically sync my music by Playlist or Artist with iTunes. When I am ready for different music I will deselect the playlist and/or artist to remove, then sync. Then I select the playlist and/or artist I want on my device and sync. I keep finding that music remains on the device even though I have deselected. I have searched all the iTunes settings and I cannot find anything to resolve this situation. So I have to spend hours tap delete all the leftover music. I have followed this article Delete music in the Apple Music app - Apple Support which at leas can be removed by album. But this still takes a very long time.
Ex: I sync a holiday playlist. After the holiday I want to remove the music so deselect the holiday playlist. After the sync, the music remains on the device.
How do I prevent this from happening?
[Re-Titled by Moderator]