Hi, PLEASE HELP!!!

I am having a weird issue were only the first song from every downloaded playlist will play in offline mode. When downloading to my mobile device (android 4.2.2 ) the download status bar takes a long time for the first song and then rips through the rest e.g. 1 second per song. Green arrow shows downloaded but songs will not play. When I attempt to play the downloaded songs the progress bar moves but no sounds and the song starts again when you try and fast forward song.

I have performed multiple clean installs and cache clearing with no change in the outcome. I am running the latest spotify . My account is premium but still within the 30day free trial (if that is making a difference???). I have over a gig of free space for music and have tried differenct music quality settings. Frustrating to say the least when the only reason I went with premium was to use Spotify on my mobile when in no service zones.

Thanks