Can you shuffle all of the playlists and tracks within on the Ipod Touch? I made lots of playlists by artist name, with hundreds of tracks in all of them. In spotify itself you can click on "library" under "collection" to shuffle all of it, but there is no "collection" or "library" buttons on the Ipod app. It seems you can only shuffle within a particular playlist and not all of them on the Ipod. Is that true or am I missing something?