Zend certified PHP/Magento developer

PayPal Payments Advanced Posts back to some odd site

I can say for sure, but after I installed Affirm as a payment method on my site, the other payment methods seem to be messed up.

Specifically in this case, payflow advanced, is only half working. It actually does collect payment at PayPal, but when it is completed, it is posting back to some other site for some odd reason. Because it doesn’t post back correctly to my site, it tells the user it was canceled or incomplete, and the transaction doesn’t show to have gone through in the backend.

PayPal tells me the payments are going, but it sees it posting to some other site and can’t help me further.

Any suggestions?