alright so it's 1981 and I place an order for 4 aircraft that will come out in 1983. I then place an order for 4 aircraft of the same family that are out in the present day. they, unexpectedly to me, get in line after the 1983 aircraft. I cancelled all orders, losing about 2/3rds of my airlines' money in the process. Would there have been away to move the orders around so that I wouldn't have to do that?