I just created a new playlist with 20 or so songs and noticed that when I try and download the songs to my SD Card on my phone several of the tracks are grayed out. When I highlight the track a message pops up at the bottom of my phone's screen saying that the track is not available; what gives? I'm a Premium member and have been for several months... I'm not sure what's going on here but is this a common issue? Is it something someone at Spotify can fix?