Ordering Multiple Orders of Same Aircraft?

How are you able to place multiple orders of an aircraft to be produced concurrently? I see on the pending deliveries of some airlines that they can receive several of the same aircraft within a few days, yet when I try to place a second order of an aircraft I already have pending deliveries for, it won't let me start receiving the 2nd order until the first one is done.

I've raised this issue up before, and theyre just delaying their aircraft to the same day, perhaps to make them more manageable....

It can also happen if the airline can't pay to take delivery, in which case it's automatically deferred to the next week. Depending on the airline's financial situation, these deferrals can pile up fast

I presume you mean like this: