This also happened to me when I signed up to iTunes Match. At first it seemed everything was working properly, a lot of uploads as expected, but with time I rea

This also happened to me when I signed up to iTunes Match. At first it seemed everything was working properly, a lot of uploads as expected, but with time I realised there were some songs missing forever. Mostly bootlegs that were returning from the cloud as the original studio songs, I lost a lot of them. The most strange one was with Tool with the song "The Pot". The files on my iTunes were from the original CD and they all got a match but "The Pot" was returning as a 96kbps file! That was it, I stopped using iTunes Match that moment and will probably never sign up for any matching service again. Long live my several library backups in different locations. My library is sacred.