I have been trying to sync my playlists so that I can listen offline. On some of my playlists, most of my tracks have a green arrow, but the entire playlist has a grey arrow next to it. Does this mean I can still listen to those songs offline even though the entire playlist isn't synced? Also how do I fix this problem? It looks to me the reason the playlist doesn't have a green arrow next to it is because there are songs on there that I have deleted that I can no longer play (they are still on the playlist, they are just in dark grey and can't be played). Any idea how to fix this? Going on a trip and want to listen offline. 

Also if this helps at all. The same playlists on my phone that aren't syncing entirely are also not showing up as being avaliable offline on my macbook. On my macbook these playlists have a syncing arrow thing next to them.