There is a display error in the regions map for the US Virgin Islands. The caption correctly reads that we have 4 finds on St. Thomas, but all the islands displayed on the map are gray.
I also think the regions need to be redefined. Not sure what the regions are, but there are apparently only two, of which one is St. Thomas. The USVI actually has three administrative regions: St. Thomas, St. John, and St. Croix.