Out Of Stock Ordering

Hi, https://www.KKToysUK.co.uk, we are trying to find out if the following is possible! If a customer buys 5 products the same but we only have 2 in stock, they can pay for all 5, but will the screen/delivery note/invoice show that 2 have been shipped and 3 to follow? Also when we enter the new stock when it arrives will it automatically allocate it to the outstanding orders? Where are back orders dealt with and how does this part of Zen work! We are dealing with foreign suppliers and stock is ordered in with a seven day delivery time to us. Many thanks for any help anyone can provide! Chris

I just noticed that when customers purchase the item which is out of stock (I did allow it in admin settings) they get the note

"Products marked with *** are out of stock. Items not in stock will be placed on backorder."

This information however does not appear on their (and mine) confirmation e-mails. Is there a way to rectify this?

As the store owner I would find it very useful to right away be alerted that the item purchased is the backorder item and the lack of this notification might be misleading to some customers (they might think that the items are already in stock).:unsure: