Yes, I have never understood this. If the people who rank the teams really believe in the rankings then the 25th ranked team should lose to the number 3 ranked team. And the rankings should not change. In fact, as long as it isn't a blowout, Illinois should probably have moved up a notch or two. And it's just not in this particular case, I have seen this happen so often. A lower-ranked team loses by, say, less than ten points to a much higher-ranked team, and then the lower-ranked team gets demoted. It makes no sense to me.