I thought before reading you might fall in that area, but for some reason there were a couple of things in the other category that made me think of you. Haven't read the NT section yet.
Mine keeps changing. First time I took it I was an INFP. Later I took it again and I was INTJ. I just took it again and got INTP, but if I had changed two answers I would have been INFP. I'm going to read all three sections with a very critical eye.
Rationally, though (haha) I'm not surprised you are a Rational. You're certainly the most rational of us all. Supposedly it is the rarest type of all the types.