Actually, one should expect "upsets" in early season games. Good teams often do not play their best the first month of the season. What you see from a team on game #1, #2 or #3 is not what you see from the same team on game #20. The really good teams improve from week to week to week. What really counts is how teams bounce back from bad games, and how they are playing down the stretch.
Also, who really knows what a team should be ranked before they play any games?
The best news is that college basketball has started.