The defected sandals (supposed to be Brand New in Box) were purchased from Ebay. I was asking for a refund and here is the partial message from the seller:
"Now that I examined the shoes I do see the extra holes you were referring to. When I look at my pictures they aren't as apparent. I didn't undo the buckles so I never saw that. Otherwise they are mint with a Neiman Marcus sticker attached. I would never think someone would want to return for this reason."
Anyway, the seller had fully refunded me at the end.
yes you are right. I am seriously thinking to keep the patent one then. Thank you for your advice.