Need help - been going on for a while now. I use an Imac to connect to my iphone 5s to upload songs onto itunes on 5s. I never sync. Manual upload only. Heres what i go through: Playlist 1 is already on my iphone 5s (every song on my Imac itunes is) I want to add a new song to Playlist 1, i update the playlist and now move it to my 5s. Now my 5s deletes the ENTIRE library just to re upload the ENTIRE library. WHY!!!!?????