My favourite music keeps disappearing

[gsivadon]

Hi, 

Today suscribed to Spotify. I started saving artists and albums, but almost half of the albums I saved disappeared after I re-opened the app (this happens in both my Mac and my iPhone). I tried saving them again twice, and the same thing happened. Am I doing somithing wrong? How can I fix this? Can someone please help me, this is extremy frustrating and I'm thinking on going back to Rdio already.

Thanks!