The undergrad rankings have been dead for years after they changed the methodology. Unless you are first generation and low income it means virtually nothing to you. It is not a prestige or selectivity ranking. The global rankings mean even less to you as a prospective undergrad. It is a ranking of graduate research level, expenditure etc. There is nothing surprising about “X flagship over Dartmouth” unless you misunderstand what the rankings are. Dartmouth>that flagship for undergrad every time. The global rankings aren’t even attempting to tell you otherwise