It looks like the store order summary is setup ok to me. When I check on the page I can see that you have specified the OrderID column as the index value for the table and to store this value in the session variable called Medifab_OrderID.
So after the order has been stored in the db you can reference this order id value on any other pages like this:
Is this how you are referencing the value in the email and other pages? One other thing that I noticed was that you have a couple of store order details server behaviors on the page but they are after the UE server behavior on the page. This should be fine since you do not have any redirect on the UE server behavior but it just seemed like it might be out of order. When you post back please include the pages from the webassist folder in your site so I can take a look there.