Detroit Muscle Tech question

I ordered multiple items from them a month or so ago via Ebay. I was credited after they combined the shipping - without me even asking them to. Here is a direct quote from their email to me;

"Detroit Muscle Technologies just sent you a partial refund of $4.54 USD for your purchase.

If you have any questions about this refund, please contact Detroit Muscle Technologies.

The amount paid by debit or credit card will be refunded to that card. The rest will be refunded to your PayPal account.

To see all the transaction details, please log into your PayPal account. It may take a few moments for this transaction to appear in your account."

Great to deal with.