They are not physically or administratively distinctive, same campus and same school with different divisions, one of which is Columbia College. Still, the campus is fairly large and the likelihood of knowing someone is dependent on whether you are in the same classes or dining hall or dorm.
somebody claims to remember:
http://www.freerepublic.com/focus/f-chat/2455348/posts
‘I was Barack Obama ’83’s roommate at Columbia College in fall 1981. I met him in 1979, when we were freshmen at Occidental College (Oxy) in Los Angeles and our dorm rooms were directly opposite each other...’
http://www.wikicu.com/Phil_Boerner
imo zero did attend Columbia College. If that Central Park image has been tampered with, it may be for one reason that has not been considered.
His relationship with the Dunhams may have broken down when he left Hawaii after high school graduation. Putting them together on the bench in the park, using photographs of the Dunhams and zero that were taken separately on different occasions perpetuates the loving family myth.
https://www.6sqft.com/before-the-white-house-the-new-york-city-homes-of-u-s-presidents/