Example... I have a album from Def Leppard. There is a playlist called "Def Leppard" and the songs are synced from my local library to the Mac desktop app. The app plays them fine. I do a offline sync to my iPhone 6+. Everything works great for a few days then on the iPhone some of the songs get replaced with "live" versions out of Spotify's library out of the blue. So when I go to play the music I get hit by crap versions instead of what I originally synced. It sounds silly but this is really ticking me off. Am I doing something wrong or is this a known "feature" for spotify?