ed2345 is correct on all counts. CDs with one track have very little information with which to identify the disc. The possible range of values is relatively small, so it is common for more than one distinct CD to share the same identifier. Because of this, Gracenote never returns an authoritative answer for CD singles, and applications are supposed to surface a pop-up dialog to allow the user to confirm the answer. If iTunes does not do this, it should...
I would note that CD Text is generally pretty crappy (on commercial CDs - if you make it yourself it's a different matter), so under most conditions you wouldn't want it to override Gracenote text. But you can edit any disc information in iTunes, so on those occasions when Gracenote data isn't exactly what you want, you can always change it to your satisfaction.
If you do edit disc information, you should send it to Gracenote, even if it's a home burn. To do this, click on "Submit CD tracknames" under the "Advanced" menu in iTunes.
Message was edited by: Elwood J Cat