There are a few scenarios when the Walk Score in NIC MAP and the Walk Score website may differ.
One scenario is when Google has updated the Latitude and Longitude for a property and either NIC MAP or the Walk Score website have not yet been updated with new geocode information.
Another scenario is when Walk Score caches the walkability score on their Walk Score website but has not yet updated it to match their API. If this or other discrepancies occur, please contact Client Services.