No offense was taken, I'm merely trying to discuss this intellectually. I do believe you misunderstood my meaning when I said to further productivity in the work place as it's not used to place an individual in a certain position, rather to put individuals around people they will more than likely work well with. As for the labeling, well you may be correct there, however I see this as more of a tool for understanding and observing patterns of behavior that are ever present among a significant portion of the population as opposed to trying to be concrete and indisputable. As for why you received differing results, it may be (as I've experienced something similar where I scored ISTP then took it again and got INTP because I have about equal Sensing and Intuition) that you're near equally Introverted as you are Extroverted. I'm no psychologist however, so what I'm saying is merely speculation and logical inferring.