The listing was set in stone several years ago, I think based on some third-party listing. Management gets asked by concerned users like you every once in a while to change the list, but I’ve not seen any changes for as long as I have participated on CC. Perhaps if we could all agree on one authoritative source for a ranking of “top” universities we could just defer to that source, but debating about such sources is a frequent occurrence on the College Search & Selection Forum, so I don’t know how we would achieve consensus.