Alex,
I was not having a go at you, but rather at those making your FCOM. Shouldn't you be 100% certain at how the throttles are connected to the engines? Is it electrical, is it mechanical or a combination? Does it make a difference whether the electrical or mechanical input is used if it's a combination?
Uncertainty leaves room for misconceptions and misinterpretations. Which again leads to....
I trust you understand what I am getting at.