Why are there two amounts pending on my bank account for a single purchase?

When using a debit card or bank card to make an E-Store purchase, the funds for the total amount of the purchase are temporarily held (shown as “pending”) by the associated bank and then settled at the time of shipment.   

However, if your order is sent in multiple shipments or there is a need to cancel an item(s) from your order, due to a possible inventory availability issue, your order is invoiced for only the items that are being shipped. As a result, there is now a discrepancy between the original hold amount and the actual charge for the item(s) shipped. The authorization number is the same for both transactions, and your bank may not recognize that the hold and settlement amounts are associated to the same purchase, due to the different monetary amounts. As your bank will not release the original hold amount for approximately seven days, overdrafts could potentially occur if sufficient funds are not available in your account.  To avoid this situation, employees are encouraged to use their Tiffany & Co. credit card or a major credit card.