I have discovered a neat tool Amazon offers called the Amazon Author Center. It lets you manage your profile (image, biography) and also contact Amazon directly with questions or comments. For instance, Amazon incorrectly showed my target age group as 9-12. I e-mailed them and learned that if a book is suitable for adults, no age group should show. Since my book is suitable for all ages (though targeting young adults 13-18), Amazon removed the reference altogether. I am impressed with this service.
If you are interested, go to the link below, and click on Amazon's Kristen Hogrefe Page.