Before you begin the rip process, be sure to fill in the tag information necessary to group the songs correctly in Media Center's views. Ensure Album, Artist, Name, Date and Genre are filled in correctly.
If the CD lookup did not match an existing CD, enter the data, and submit it. Or if you had to make corrections. Right click the drive under Drives & Devices, and Submit to Internet.
Subsequent lookups will then return data for you and others.