A: Is this, by any chance, on a debit card, rather than a credit card? For some reason debit card holders see the reserve on their account as a charge, even though we do not have the money. Once we bill the order (at the time of shipping) the card is actually charged, and we receive that reserved money.
If the total changes, however, a new reserve will be placed for the new amount, and (if this is a debit card) you’ll see that as a separate transaction. The old reserve will never be charged, however, since on our end, your order is associated with only one reserve – the new one for the new amount. The old reserve will simply expire unused.
We only have one order for you, so we’ve only gotten paid for the one charge.
Your credit card would have been reserved at the time you placed your order, and when we adjusted your order, the total would have changed, and the bank system would not be able to match the new total to the old reserve, so the charge would go through as a separate transaction when we shipped.
Please rest assured that we only have money from you for the updated total, and the first transaction you see on the card, for the original amount, is only a reserve, which will expire. We never had that money, and never will, since we charged the second amount for your order.
You should be able to get more information from your bank if you have questions about that particular transaction. It should simply disappear from your record after the reserve period. We’re not sure how long that will be. For actual credit cards, the reserve can last as long as a month.