Position 1 & 2 seem to do the same thing, tail logo light is on,  position 1 I thought was only NAV lights no logo?

Also exterior pilot eye view point is too high, they seem to be modeled sitting way too high above the head rest were their heads should be.

 

 

No, the switch is just a selector for the backwards facing white navlights

 

The pilots are just the default MSFS model, and we can't change their size or position I'm afraid.

I am using Luffthansa livery and the logo is not being illuminated at night neither in position 1 nor 2.

Correction, it wasn´t showing while flying, now that I'm on the ground it's iluminating the logo. Go figure!?

Logo lights, I believe, only come on when the landing gear is down. It is an Airbus trademark of their planes.