So currently all seems to be working as it should except for the receipt email going to your admin email address?
Have you tested a transaction with this email address set in the profile for the user making the transaction? This would be a good check to determine if the email receipt was not being sent, or if was just not being received. If you can test a transaction using the admin's email address and get the receipt then it would indicate that there is a problem sending the receipt to the cc or bcc. If you can't get the receipt email then it would indicate there is a problem delivering mail to the admin's email address through PowerStore.
Please give these things a try and get back to us with the result and any other details that you can come up with.
As for getting rid of DirectPay on the checkout page you could just comment out the direct pay checkout form.