eBay charged me more than I received during a refund, why is this the case?

[pkcardca]

I recently had an issue with an order that I had to refund. Will not go into details besides:

I never shipped the item

I cancelled the order as the seller and refunded the buyer

Prior to this ordeal, eBay paid out directly to my bank account. I was given C$368 via an EFT deposit. During the refund, I was asked to send funds from my bank, and was charged $380 from my bank account, shipping credits and other fees were applied from the account. What happened to the 12 dollars missing from this equation?

[pkcardca · Accepted solution]

Nevermind, I got it sorted. It was a shipping label from a PREVIOUS order that got billed.