PayFast and MarketPress

MarketPress plugin is integrated with the PayFast payment gateway. Integration was done by the PayFast developers and it can be found here:

When integration with PayFast is active, after a purchase user redirects to a Checkout page, wish is empty. While it should redirect to an Order Status page. The redirection link is

Please advise what changes need to be done by the developers of PayFast to redirect to a page set by the MarketPress plugin