ITunes won't copy/sync all my music onto my IPhone 6
Recently I have been purchasing music and making new playlists or adding to existing playlists. When I go to copy a playlist over to my IPhone or to SYNC my music all the songs won't copy over - some are omitted. What is going on? This is very frustrating!! I have tried manually updating music but it still happens. I have also added purchased songs to my playlist on my IPhone, but when I go to sync anything off my computer (ie. I want to create some new playlists, manage music, purchase a bunch of new songs) the playlists don't sync properly again and the same songs that were missing are missing again. Hope this is making sense! Please advise.....
I have an IPhone 6 and IOS 9.3.1 all updates are current and I am using ITunes 11.4
iPhone 6, iOS 9.3.1