I have this problem for a lot of my music too.
And it's even on songs that I know are available on the iTunes store.
If anybody could help us out that I would be greatly appreciated. ^.^
I haven't played with it in great detail, but I'm guessing that it has something to do with differences between your metadata and their metadata for the song. I know my Genius is picking up songs that I ripped, and I know it's
sometimes doing it when I've changed the metadata. I just tried it...
- It included a song where it had two artists listed in the Artist field, and I made it just one artist there and the other one in parenthesis in the title -- "(feat. The Used)", and it included this song. I was able to get it to do this both for songs purchased from iTunes and songs ripped from CDs.
- It included a song where I changed the artist completely -- random example, but I had an iTunes purchased song by t.A.T.u and I changed it so that it had their name in Russian / Cyrillic followed by their name in English / Roman -- again this worked fine. I don't think I was able to contrive a situation where this was done for a ripped song, though.
But I'm thinking there's some kind of matching-to-known song going on, and the farther your song varies from theirs (in terms of ... I don't know what, but presumably name, artist, album art, length, etc), the less likely it's being identified and tagged to the matching song in iTunes.