I'm not sure i follow. I see notification for payment which shows:
(notifcation raw data)
...
'CREDITCARDTYPE' => 'discover',
'ACCT' => 'XXXX XXXX XXXX XXXXXX',
$_POST=array (
'cbpcardtype' => 'discover',
'cbpnumber' => 'XXXX XXXX XXXX XXXX',
Then IPN raw data does not show any card type name, just ... 'payment_type' => 'instant',
I still don't understand how to fix it.