If FreeDB finds multiple potential matches for your CD, they'll all be displayed in this dialog. Choose the one that looks right to you. If it turns out to be wrong, click the "Import" button on the Tracks Dialog again and repeat the process and choose another one.
When FreeDB finds multiple matches, they're usually multiple copies of nearly identical playlists, with slight variations in obscure fields that Acoustica CD/DVD Label Maker doesn't really care about. As long as the artist and album names are correct, you probably won't go wrong.