You need to take into account that BSU will drop some if all their hard games are behind them. The computers use strength of schedule and are still 25% of the BCS ranking.
This is true, but with that strength of schedule it also looks at how a teams opponents did. BSU fans should be huge fans of the other teams on their schedule (except when playing them of course).
The better Oregon, Louisiana Tech, and New Mexico State do in particular, the better BSU does. The other teams I don't think will boost BSU up as much as these teams will if they manage to win games against higher ranked opponents.