Deleted an artist from my itunes library and songs became incorrectly labled. Easy fix?

Hi,

I deleted an artist from my iTunes library by right clicking and selecting delete on the artist name on the left side of the screen using the "artist" view (in case that is relevant). Not long after, I noticed that approximately 5% of my library had become shuffled around. A track would be mislabled, given an existing track name that was incorrect and attributed to a different artist (ie suddenly Airbag by Radiohead was shown in my library as Caring is Creepy by the Shins). The only information that seemed to follow the track to its new, incorrect location was the length of the track and the album art. As soon as I would select an incorrectly labled song to play the information would become correct and it would replace the song mostly where it belongs (although now many of my albums and artists are split into multiple entries for some reason), and I hunted out a pretty decent portion of the problem songs and fixed them that way, but many are still missing and I have a massive library. Short of literally pressing play on every single song in my library is there a way to fix this? It has also messed up my iPhone (4) in it's ability to search alphabetically, as several of the artist names appear out of sequence in the alphabetical list. I have to believe that there is some blanket way to fix this problem in one process, and I have tried selecting my whole library, right clicking and selecting "get info" hoping it would trigger something but that didn't do anything.

Please, any help would be greatly appreciated.

Thank you,

Travis

P.S. Note to Apple, $19 for a support call, really?