Your average across tests is coming out more "N" than "S"? But are you coming out 53% or 52% one way or the other on each of the tests? If so, that could just indicate that you are a flexible thinker who can get along easily with both N's and S's...which would benefit you in any career.
I also find that my surroundings and job tends to influence how I test. I'm usually borderline J/P but tend to be very "NT" when I work in a high-powered scientific environment but less pronouncedly so when I work in humanities or a less achievement oriented scientific group.
So, it may not be superimportant to pin it down per se, but more important to see how your results can work for you as you choose your next stage career.