That 'they met while they were both at Harvard' was an early fairy-story, it was later revised. Mark must have committed Part One to memory...and it stuck, so he had to correct himself. That entire interview was a study in what happens when you memorise a script that keeps changing...poor fellow. It wasn't his best day.
I watched the entire interview several weeks ago. Mark comes across quite well throughout. You really have to be a hyper critical nitpicker attack artist to take him apart over it. Or else just really hate him.