OKG
I'll give you my most sincere congratulations. You are really good at beating around the bush.
Let me ask you a question: are you a professional pilot or a lawyer?
You claim that they had dual autopilots engaged in ILS Approach Mode.
The first exception that comes to my mind is that given the windy conditions that was not the best option.
I have perhaps some other objection that better demolish your thesis, but before formulating them, I have to study more about what you say and the current conditions of efficiency of the airport.
As to the position of the stabilizer in the various phases of flight, I encourage you to check your stab trim ind which while during cruise is close to zero, and it could only be like that for drag reasons, while during the approach, in landing configuration, at the correct speed it is very much ANU.
Regards