Aveo T250 ECU pinout

[Ajax]

Hi! So, I was studying the pinout of my ECM, and it looks something like this:



As you can see, there are two similar set of pins. One set controls ignition for coils 2 and 3 and the other for coils 1 and 4.

I have a single coil system, so I assume those pins control the spark plugs directly by sending a signal to the coil.

My question is, why are there two sets of pins that control the same instead of 4 pins (one for each spark plug)?

Are two spark plugs firing at the same time? Do those pins only control timing, and the firing is directed by a different circuit?

Thanks in advance for any help you can provide.

[Ajax]

Pictures look small so I'll post them again here:

https://freeimage.host/i/JRlddzB
https://freeimage.host/i/JRlftqB