I have noticed that a lot the music I download I can't listen to after a few days.

[iMore Question]

It says item not available and appears grayed out in my library. If I delete it from my library and download it again it shows up, but I don't want to have to do that every time. I literally have a playlist with 35 songs and I can only listen to 4. On my PC beside all of my downloaded music there is a connect the dot looking cloud that says waiting. waiting for what? I just want to listen to my music.