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Have you had issues importing and editing information from other CDs, or just this one?
I would check your preference settings in iTunes and try to import the entire CD again. You can also try just adding one track by dragging it to a playlist to see if you get a different result. These articles may help ...
Editing and arranging content
Each audio or video file in iTunes has several settings and tags that can be easily modified. These options can be accessed by selecting any file in the iTunes browser windows and selecting "Get Info" from the File menu. You can add song lyrics, artwork and set special playback options. The "Info" tab lets you edit information about the file including artist and album info.