Kevin,
	I have a site upgrade to DNN 5.6 and I have installed smith cart 4.6, I am still seeing the same problem.
	my store is setup in a very basic manner at this time.  I have one product and for this given product I have indicated that 14 are in inventory and I have uploaded 14 serial numbers.  I also have the store setup to only accept purchase orders.
	When I go to place a test order I place a qty of 2 to the cart and the price is calculating fine.  When in the cart I can see that the qty on hand is 14.  When I go to check out everything goes fine but only 1 serial number is given in the confirmation.  When I go in to look at the serial number assignment only 1 was assigned!
	Is a setting not correct?