A BIG mistake in iTunes Match. Please help.

Hello smart people. I was trying to clean up my iTunes Match library. I came across a triple album, in which the songs were all listed as 1,1,1,2,2,2,3,3,3...and so on. I highlights all the songs on disc 1, added "Disc 1" to the album name, and hit save. I double checked, and only the 13 songs on this disc were highlighted. Much to my horror, after hitting OK, EVERY song from this artist, over 25 albums, all appear under the single "Box of Scorpions Disc 1" album. The "UNDO" tab is greyed out. Any suggestions would be highly appreciated by Speedy. Thank you.

Andy

I'd have a look at the info for one of the files, see where Disk 1 is mentioned, then select all of the affected files and remove Disk 1 from whichever field it has populated.

Actually, that's not exactly how I'd do it. I'd be a lot more careful than my first sentence makes me appear, but essentially that's what I'd be looking to do.