User blog:Chris Peet/Mass effect deception kai leng N6/N7

I know there's a lot being said about the errors in mass effect deception and one on the list is that in the book kai leng is described as being a former N6 rated solider in the alliance and on the mass effect deception errors page

https://docs.google.com/document/d/1XBpMF3ONlI308D9IGG8KICBHfWKU0sXh0ntukv-_cmo/edit?pli=1

it states that he should be N7, but to me it make's sense that he could be N6 instead of N7 (the n for a solider belonging to the special forces and the number for the level of proficiency that a solider is (7 being the highest) so could he not be a really good solider but not good enough to qualify for N7 So instead he is N6?????? Makes sense to me......