My understanding is that WU uses the lat/long for the geo-center of the town as 'home', then stations appear in the list based on 'nearest' to that geo-center. My station is in the middle of Saratoga, close to the geo-center of the city, so it appears first in the list. The town center, is a ways to my south-east, so it appears that they're using the geo-center, not the 'town hall' as the metric.
Best regards,
Ken