Not sure how OSU could be at #2 in the standings if the polls go with Bama. Polls have more weight than the computers.
Because it's about points.
I can't remember exactly how it works, but teams get extra points for having #2 rankings.
And it's the point combination of the three polls that gives a team its BCS ranking.
So for example, it doesn't matter if a team wins the Harris and Coaches poll ranking but loses the computer poll ranking. If enough Harris/Coaches voters voted a team #1 and #2, that could help them jump teams that technically have won more parts of the BCS. Those #1 and #2 votes give them extra points.
I literally rolled out of bed three minutes ago, so I wish I could explain this better. Although, knowing the lunacy of the BCS, I don't think I could accurately explain how it works even if it was noon.