Port Chester is about 3 miles long so from the center, it would be a 1.5 mile radius. The only way for that to change would be to edit in Sentinel but it most likely would not change anything as your 10 mile range should overlap it.
There are 3 range settings.
Site range which is set to 10 miles and looks to cover all of that area.
Department range is set to 1.5 miles and looks to be inside the 10 mile range of site 3.
Then there's scan range in your scanner. Menu-Set Your Location-Set Range. What do you have that set for?