Thanks to many prompt reports from our astute Merchants, we discovered a bug that started misbehaving in our code starting around ~6pm MST today, Thu18Sep08, which was briefly doubling the price of any items added to a buyer's cart. We resolved this issue within minutes of hearing from you all about it, so everything should be back to normal now.
If you ever discover something misbehaving with your E-junkie cart service, ESPECIALLY if it seemed to start all by itself when you had not been altering any of your settings in Seller Admin recently, please do not hesitate to email or leave us an emergency-hotline voicemail immediately:
http://www.e-junkie.com/ej/contact.php