He says he regretted implying that he dropped out of Harvard College.
I think, though, that the disdain for saying "I went to Harvard" when you've attended the extension school is rooted more in emotion/ego/pretension than anything else. A "real" Harvard attendee might not actively look down on someone who attended HES, but would probably scoff at the idea that they "went to Harvard". Higher education has a lot of weird social signaling and other crap that's hard to unpack.
But I do think that the accepted meaning of "I went to X" is that you physically attended classes full-time at the university's main campus. Saying that, when you attended their extension school, is at best misleading.
He's now "Founding Partner, Fifty Years [Seed fund], 2015 - 2023"
> Appears he is still citing Harvard
Yes, because he did study at Harvard's "Extension School", which is properly cited on the page.