D800 focus with 1.4 prime lenses is very variable and inaccurate

This time it's even worse. I focused perfectly over child's face and eyes, well away from the man's nose, but this is what it picked out: sharpest plane of focus is his nose. This is at f/2 yet it still is incapable of giving me what I need. One of the cross sensor AF points where used. Again, AF-S, single mode, no dynamic area modes etc, just pure and simple AF-S one focus box mode: Absolutely static subject (he was still believe me).

Full shot:



Crop showing focused in front of target on man's nose: (sensor was well lower than this on child face):