Seeing two charges?
It's possible it may be an authorization hold. All orders create an "authorization hold" when you place an order, which is similar to what happens when you check into a hotel and the concierge holds a charge on your credit card. Once the order goes through, this hold clears and you should see only the single charge for the order.
To learn more about authorization holds, please review this article:
如果你仍需取得關於重複收費的協助，請提供以下資料，以便我們調查：