iTunes help needed

[BIG]

I'm a stickler for having the proper Song, Artist and genre correct on my hard drive. I notice that it is not always correct in iTunes and when I go to make changes, they don't save! How am I able to ensure these changes are correct and saved on iTunes?

TIA

[freakshow]

They should save when iTunes saves them. Are you sure you're looking at the same files? eg. After you import them, they get copied somewhere else?

[BIG]

Nope, they're still in the same place.

What I try to do is when I open iTunes, I import the music, I right click on a song and click 'Get Info', at which point I try to modify the information. When I click 'OK' it is fine. But if I delete the song from iTunes, but not from the hard drive and then try importing the music again, all the information that I had changed reverted back to what it was before I made the change.