Affiliate credit vs customer credit

Since the customer account and affiliate accounts are one and the same, I am running into the issue that the credit transactions are being reported to the account holder in the same way.
For example: an affiliate with a balance of $10. I issue a credit of $10 as a check, and put it as a $10 credit on their transactions ta. But the auto-email treats it like a customer store credit. If I re-word the email to be appropriate for the affiliate then it's going to be incorrect for a customer return.

Is there another way of handling this?

Thanks

Affiliate Transactions for openCart 3
(this is my extension)