Originally Posted by lagcam

Sadly, chargebacks can hit at any time up to 6 months after the transaction, (and in extremely rare cases evn longer) and it is not unusual for them to hit you in little batches although sometimes you get "lucky" and some from same customer are not reversed.

I am guessing, (because we have no affiliation or association with that site) that the refunds are transactions that they themselves or their processors have flagged as suspect, AFTER they were approved, and they have refunded them prior to them being charged back in an attempt to minimise chargebacks (that sites are penalised for more).

Whatever the case, I am sorry for your loss. Chargebacks are theft, pure and simple.