First, welcome to Nikonians. You are absolutely going to love this site. It is the best money you will spend for sometime!
I too wonder why Nikon reversed the + and - exposure in the new cameras. But fortunately you can "correct" their "mistake." BTW, they'll NEVER explain their reasoning: they are inscrutable.
And may I note that you are demonstrating a male trait my wife is always happy to point out to me -- not reading the instructions when getting into a new piece of equipment or asking for directions when lost! Good on ya! Never fear -- just sk someone here at Nikonians. BTW too, you can download a digital version of the D800 manual and search it vice reading the whole darned thing, or better yet, buy Digital Darrel or Busch's excellent books and skip the manual.