Also, she said they did not really care for the time frame you will be drawing your experiences for the essays from.
They want to know how you "will add to the confusion" at MIT, so you decide what best describes you/answers the questions.
Say, in my case, I absolutely have to talk about my succesful start up company I started at third year in universtiy. I sold it seven years ago, but I am still going to talk about it because this experience shows my entrepreneurial spirit. No way I am going to limit myself with a stupid 2 year *regulation*.
What? Are they going to deny you admission because in your essays you have talked about an earlier period of your life? I cannot imagine an adcom saying "Aghh, this guy's experiences are too outdated... He did not adhere to the two year rule, I am going to ding him for that now!" This is nonsense.