Originally Posted by mduell

You're confusing the booking class (saver or standard) with the availability.

This is the same as booking a Y fare when a W fare is available. Or booking a multi-carrier M ticket where some segments on OAL are in lower buckets. A saver ticket may include only saver segments, a standard ticket may include both saver and standard segments.

Similarly different airlines have different redemption prices. Saver may be 120k miles through NH or AC and 90k through US Air for the same cabin/flights.