Apple is more then likely authorizing your card for these transactions but not "charging" your card for the transactions. An "authorization" is like a hold on your account but after a few days pass, the money will be made available again. Gas stations and restaurants do it all the time. Call the 800 number on the back of your buxx.com card and they should be able to help you understand what the charges are. If my explanation is not correct, its is possible that Apple made an error in which case, you can file a "charge back" on the Visa buxx card and the money will be credited back to your account.