I'm a bit confused on how offline syncing works. It seems that the files marked as available offline on an ipod under my account are also being download for offline play on my android phone. The files on my ipod are not in playlists, just separate songs. How do i set spotify up to make sure only the files that each device selects as available offline are downloaded on that particular device? Or is that not possible and we have to have the same offline songs on all devices?