What program did you use to set the tags in the first place? If you used ID3 tag extension you may have set every tag the same for a directory of Mp3s. I did the same thing when I was figuring out the interface. But if you know how to use it that is a very quick way to fix tags on many files at once.
Tom

Reg #2845: Mark 1 #00173, Mark 2 #119
_________________________
Reg #2845: Mark 1 #00173, Mark 2 #119, Mark 2a