If Set Engine master 1 or 2 and Set Engine Norm Mode are tied to the same key, the TCA Qurdrant switches back to Mode Norm, and so on in the game.
It’s not the perfect way, so it doesn’t work when the engine master is turned off.
So it moves back to Norm as soon as you hit engine master 2? But don’t you need both engines to be fully complete their powerup sequence and available on idle before switching it back to Norm? I would assume the engine would stop powering up when switched to norm before the ignition start cycle is fully completed.
Also, I don’t think you need all that binding. All you need is Set Engine Master and Set Engine fuel valve. That’s it. There’s no need to bind Set starter 1 as well (unless you’re planning to use it for other aircraft that uses that instead).
But binding the toggle engine fuel valve on top of the set fuel valve would be a bad idea. As toggle is used for buttons that when you press and it activates and deactivates as soon as you release the button. The engine switches in the TCA quadrant are presistent switches, meaning when you switch it on, it constantly feeding the computer with the button as active input, and will deactivate when you switch it off. Putting this switch into toggle would make the sim constatly switching it off and on multiple times, and it’s conflicted with the “set” that always set the fuel valve to on.
I suggest you streamlined your bindings.
First, I inform you that my meaning may not be delivered properly because I am not a native English speaker. 
The screenshot confused you. The important thing is, ‘Set Engine Master 1 or 2 and Set Engine Norm Mode,’ as I said. You won’t have to see anything else.
Anyway, I understand what you said about the valves.