The sync button does not seem to do anything. If I just let RVRB play, it'll play all of the songs in the playlist just fine, but the queue on the website either won't update, or will show some duplicate songs. These duplicates won't actually play or show up in the playlist though.

When I remove or move a song in the Spotify playlist, RVRB won't reflect these changes, and will also still play the queue in the original order of the playlist, even though the queue on RVRB shows something completely different (mostly due to the duplicated songs).