Stock/Inventory
While the inventory showing is real time, a few things can affect actual stock levels; orders are allocated on a first placed basis, your order will only be processed when you submit the cart, if another order was placed before then, the stock will get allocated to the other order.
If a product appears as ‘Out of Stock’ you may still place your order.
Not immediately, when an item is placed on backorder a customer service representative will contact you within 2 business hours to discuss availability and shipment times, at this time they will also ask whether you prefer to ship the rest of the products in your order immediately, or wait for your backorder.