Here's a theory -
Is it possible that due to the utter lack of communication from Tesla, causing some to make multiple bogus orders (trying to make sense of the production priority) is actually backfiring..
Since everything is automated, there are many orders that are just placeholders, extending the production time for actual order's. Grant it. Tesla will just sell the bogus order to someone with those configuration requirements - which in turn allows someone to 'cut the line'.
Maybe if those order's that people aren't intending to keep, just cancel their additional orders - the actual real order's will receive reduced EDD.
Basically the system just sees an order an allocates resources/dates based on number of units already ordered. Let's try to reduce the numbers and see if it has any effect.
Just a thought...