You are assuming that the cars are built sequentially based on the reservation number.
That is not the case. That's why they set expectations of 6+ months to delivery when you ordered.
Tesla is clearly building cars in batches based on some kind of a scheme. Maybe based on material availability or minimizing machine set up or avoiding feeding the Herby.
I think this community is great but I also think that we are driving ourselves crazy demanding minutiae and detail and create expectations that don't exist. It's great how much info there is here but sometimes too much information can create more anxiety rather than calm