Every year in college football, teams' rankings are inflated due to ease of schedule or ongoing win streaks. The real value of the team is lost within the polls.
Some teams get underranked, other teams overranked, but the constant with rankings is that it is an imperfect system. We use them to project who the best teams are, but a loss from any team could drop it well below its value and vault a team worse than it into a higher ranking.
It's how the college sports world turns.
It happens in basketball, and it happens in football. Overranking and underranking teams is just a way of the world.
Here are some teams who are overranked in the latest USA Today polls.