This is a known issue...some people have been trimming down the files on their computer to match iTunes songs. For example if a song on iTunes is 2:55 and your song is 2:57 seconds...try to trim to 2:55 and delete it from icloud/your computer, remove it from the trash and throw it back in iTunes and see if it matches. I have HUNDREDS of songs that didn't match but this work around would take me forever so I am just waiting for Apple to fix...good luck if you do decided to do this.