Hello,
On our site, http://theglobalelements.com/, we are running in to an issue we have traced back to the MyStore theme.
The issue occurs when trying to confirm a purchase. Users are able to go through the entire purchase process, but when they select "Credit Card, provided by authorize.net" they are able to proceed to confirm the purchase, only to be taken back to the credit credit information page.
We have tested other payment plugins such as Google Wallet, and Paypal and have also used the default Joomla theme to navigate to the payment details page, and the purchase was completed without any errors.
We would like to rectify this issue immediately.