This has been a crazy year for rankings and I honestly think there are only a few true title contenders. The Oregon/Indiana game should be really telling. I also think Miami looks strong with a lot of speed and may be legit despite the ACC struggling this year.
As for Nebraska, they did not look great today, BUT they are bunched up with several other 1 loss teams. In theory, Nebraska should be ranked higher than Cincy who should be ranked higher than Iowa State. They should also be ranked higher than Penn State, Florida State and Texas who all have 2 losses.