Hey, @KalRe. 

I appreciate you coming back and expressing your concerns over particular transactions within your QuickBooks Online account. I'd be more than happy to give you a detailed explanation about these transactions. 

Credit memos simply lower the customer's accounts receivable. Therefore, a refund not only credits the customer but also takes funds out of your register (you would've actually sent money back to the customer in this case). 

In a shorter version: Credit memos only reduce the balance owed, while refunds actually send funds back to the customer on top of that (one is more of an adjustment and the other is an actual transaction)

I hope this helps. If you have any further questions, please don't hesitate to come back. We're always here to lend a helping hand!