From what I understand, all dealerships are allocated a certain number of MKX's per month. This applies to all dealership in North America, not just large dealerships. So if your dealership had a lot of MKX's ordered prior to yours...chances are, their allocation is used up for awhile. [i may be wrong here, but that's the way I understood it]
It was about 5 weeks between the order date and the date my MKX got serialized. The reason it took so long was because of the lack of allocation.
Unless an employee on here can help you out further, you probably need to call customer relations and see what the deal is. On the order sheet, what priority was the order (should be 10-15)?