Stagger jetting question

Vizard is English isn't he? His passenger side is the left side of the car.
Either way, I don't get the concept. Not saying it doesn't work, just say'n I don't understand how a cylinder knows to pull from one throttle plate where the jetting is XX and not the other throttle plate which is XX jetting.... when all 4 throttle plates are exposed on an open plenum to every cylinder.