As a premium user I use the spotify app a lot. However, when I downloaded songs to my device using the "download" function, and turn on the offline mode, only 1 song will play. It will not play other songs or the same song again. When I get out of offline mode (hence, activate online mode again) the songs will play without any problems.
Can it be that the offline mode needs a signal? (bug?) Songs that are marked as downloaded when I'm in online mode seem to use data as well.
Online mode and streaming work fine! Btw, I use a blackberry 9360.