Some times, some music that is available in the iTunes Store, later on is not available anymore
When I buy music from iTunes Store, I put it in the Sopping Cart first, after I have several songs, I re-check the Shopping Cart (I may change my mind on some songs)
This morning after I click [BUY NOW] they ask me to refresh my Shopping Cart. One song disappeared, and I couldn't buy it anymore.
I see their library keep getting bigger, but why some songs disappear