Not the location? You are looking on the outside edges of the devices. Look at the centers. This is
Machine Doubling. Caused by the machine. On a doubled die, the doubling is on the die. And a doubled die can have
Machine Doubling. Because it is caused by the machine. But
Machine Doubling never makes a doubled die. Why? Because the hub doubling is on the die. A doubled die is created doubled. A normal die is just normal.

Look at the centers of the devices, not on the outside edges of devices. Normal and a
DDR. Note the closed devices are even smaller in size, because of the enlargement of the devices.