I can't make any changes to the track information in iTunes. Since many of the entrie in CDDB are incorrect or poorly done, I like to correct them. That's how I roll.
The tags don't get updated by iTunes unless you change them in iTunes.
It is WMP or Zune software updating the tags then iTunes reads them.
Windows Media Player is changing the ID3 tags.
Open Windows Media Player.
Go to Tools -> Options.
Click the Library tab.
Under Automatic Media information updates for files, uncheck everything.