Magento: {{var payment}} showing two cards in admin and emails - php

Question

Situation:
We recently took a magento store live and when we got our domain setup properly our payment info started showing double entries for some reason. This double entry shows anywhere that payment info would normally show (customer account, admin order view, emails, and printed orders).
Problem:
What we see now is this:
Credit Card
Credit Card 1
Credit Card Type: CardType
Credit Card Number: xxxx-0000
Processed Amount: $1XX.XX
Credit Card 2
Credit Card Type: CardType
Credit Card Number: xxxx-0000
Order was placed using USD
We are getting calls and emails from customers wanting to be sure we haven't charged them twice, but the payment only goes through once so I know the actual payment method (Authorize.net) is still working properly.
I'm not sure what would have caused this problem since the only change that was made was to stop running off IP when we pointed the domain. I want to get the original problem fixed, but if I can't then I need to know how to pull specific data out of {{var payment}} so that I can just show:
a.)Payment type
b.)[if credit card]Card type
c.)Payment amount
Any help is greatly appreciated.

Answer 1

We have been experiencing the same problem. (Magento Enterprise 1.13.02) We tested on a clean installation and did not have the problem, and began to investigate. Here's what we found, and how we fixed it:
The good news is, there is only a single charge -- it's just being displayed twice because of an 'if statement' unexpectedly returning true.
In this file:
/app/code/core/Mage/Paygate/Block/Authorizenet/Info/Cc.php
You will see function called getCards. This part was causing the problem for us:
if ($this->getInfo()->getCcType() && $this->_isCheckoutProgressBlockFlag) {
$cards[] = $this->getSpecificInformation();
}
Specifically, getCcType was returning a value, where on a clean installation it was not.
In our case, we found an Order/Invoice Editor extension to be the source of the problem. This one, specifically:
http://www.magentocommerce.com/magento-connect/re-authorize-order-editor-grid-manager-invoice-editor.html
Orders placed while this extension is enabled have credit card details (such as CcType, and the encrypted card number) saved in the database (sales_flat_order_payment). Orders placed with this extension disabled do not.
We have contacted the developer for clarification, as we do not want the PCI compliance headache of storing encrypted credit card numbers.
We've disabled the extension for now, and it has solved our problem. We could modify the above mentioned 'if statement' if we wanted to keep storing credit cards and display properly.
Hope this helps!