The problem never corrected itself but today I got the final answer from support:
We have refunded and re-downloaded back the image with the correct amount. Please see as attached.
If you need any further assistance, kindly do not hesitate to contact us.
I never had a commission on that image downloaded on the 14th but I had another download two days ago, I don't see how is that a refund.
Anyway, they fixed it very conveniently on the last day of the month, what can I say?
$0.13 minus more taxes at home, conversion fees, transaction fees, I wonder why am I still uploading?
At least, support is always very kind.