The US News and World report ranking that you are referring to are the for the "top national universities" which are universities "that offer a wide range of undergraduate majors as well as master's and doctoral degrees; many strongly emphasize research." Geneseo does not offer doctoral programs and is a part of the "masters universities" rankings. Master's Universities are described as "institutions provide a full range of undergraduate and master's programs. But they offer few, if any, doctoral programs."
National Universities rankings
Master's Universities rankings
But it's just rankings, it doesn't really mean all that much because I am sure some other source has a different opinion.