here is Korea and I am Korean.
I've checked five D800 bodies and it has same problem.
left af point has problem
if you want see , use 85mm/f1.4/6m is best to check or 50mm/f1.4/3m is also good.
first picture, middle point shot(body adjustment 0)
second picture, left point shot(body adjustment 0)
arrow means depth!
Nikon Korea says it's not defective product and NO one-to-one exchange.
And no official position yet.
check your body!