All sales are subject to availability of product from the manufacturer. While we continue to sell product as fast as we can obtain it, we are not able to get enough of some products fast enough. All of the manufacturers that have this problem have plans to remedy this situation, but it takes time to implement their plans. Until this problem is resolved: (1) We will charge for and ship those products that we have immediately; (2) We will backorder for the products we do not have on hand, and; (3) When the backordered product comes in, we will ship and charge for them immediately, without charging for additional shipping than allowed in the actual order. As a result, we are only charging, at the time, for those products that you are receiving at the time, and you will not be charged for any more shipping than you would have had to pay if we had all the product and had shipped it immediately in one order. I'm sorry that we can't get all the products we need fast enough, but it is a problem that all of us vendors, including competitors, are having. We continue to do our best.