The victories over Jamaica and Panama were not enough to propel the Yanks farther up the rankings. The failure to crack the Top 7 means the USMNT did not receive a World Cup seed.
The Americans’ immobility despite the two wins was due to a strong showing from the world’s top teams (with the exception of Italy) and countries like Switzerland and Chile earning big wins to leap-frog the Yanks. With wins over Albania and Slovenia, Switzerland shot up seven places to #7 while Chile advanced four places to #12 with their victory over Ecuador and the draw with Columbia.
Source: Mike Prindiville, NBC Sports US Men's National Team Rank Stays at 13 by Damian Arbuckle