the ipod in my wife's car is dead so decided to set her up on my Apple Music account which i turned into a family plan. Was a bit hard to setup, but finally i more or less got it to work. I first opened an apple id for her on the phone, than moved to my Mac, and setup the account from there. My Apple music library was available to her on itunes logged in on her ID, and once the Mac spent a long time doing whatever it was doing on icloud (does it upload the library AGAIN?), I could see the playlists and the songs on the phone. So far so good, but when I started the (tedious) task of downloading the songs to the phone (no way of asking the app to download the entire library at once?), i noticed immediately that the phone app music library has only a third of the songs. any idea why? How can I troubleshoot this?