The Saints have NOT been eliminated from the #1 seed. However, by vitue of the Saints losing today and Seattle winning (and by Philly losing), Seattle has been eliminated from the 2,3,4, and 6 seeds. Seattle is assured of a playoff berth, but it can only be the #1 or #5 seed.
The only way the Saints get the #1 seed is for them to win out, Seattle to lose out and for San Fran to win out. San Fran gets the divisional record, and New Orleans would get the #1 seed vs San Fran by virtue of head to head.