May I politely point suggest that "Reservation Number" is not synonomous with "Build Order"? As an example, the AWD is shown as late availability. Clearly those "reservations" won't be assigned correlated build orders.
More, my reading of the reservation process implied changes can affect "build order". Do they? How significant a change is needed? I know none of those answers.
My thought is we'd be remiss in concluding nothing is changing just because a reservation number didn't change.
But WTF do I know, so...