e30 fuel injector wiring

[potatomash]

So I was testing my injectors last night with them just shooting into plastic bottles. As I understand they should fire in 2 banks, but heres what happened..

I put power to one of the banks and 3 of them went on as expected (1/3/5 I think). Then I put power to the other bank and all of them went on...

Thats not right is it..?

[e30onBBSs]

Idk if this helps but the injector power wires are the white and brown wire for half of them and brown and yellow wire for the other half on the c191