Welcome to MobileRead, ketinmd.
I can't answer your question as to the bookmarking, mine has never done that.
Perhaps someone more knowlegabel can, if not, try the Amazon CS......they are outstanding.
Have you seen this page? Lots of great "getting started" tips. If your question isn't answered here, use the "contact Us" button,,sign into your account, and choose the "call me" feature. They call back within minutes.
http://www.amazon.com/gp/help/custom...deId=200375430
Good luck and let us know what you find out.