Sounds like the dreaded "TBD".
When Ford/Lincoln was short on a particular part, instead of stopping production to wait for the part, they built the cars without it and essentially set them aside until the parts came in. Status: TBD. Unfortunately, when they resolved the supply shortage, all the parts coming in would go into cars currently being built, leaving the TBD cars unfinished with no real end in sight.
Lots of folks just ended up putting in a 2nd order from the dealership. Which, not surprisingly, came in well before their first order.
GL!