thats the way it is, the left and right front runners go to the front 2 cylinders, the middle 2 front runners feed cylinders 3 and 4, backside works the same way
its screwy, i know…
in this pic you can just barely see that the midle runners of each bank point towards the front and rear of the engine
http://www.zparts.com/showcase/engines/images/q45zpower_16rw.jpg