A circa-2002 directory map shows the original nine Neighborhood, east-to-west, configuration of the shopping venue. 
Drawing from www.mills.com

A directory map from 2007 shows the post-2005 Neighborhood reorganization. Five mall districts now progress from west-to-east. The Neighborhood 1 section of the mall was recently renamed "The Fashion District At Potomac Mills"
Drawing from www.simon.com (Simon Property Group)