See description by another in the 'feature request' category. <http://project-gc.com/qa/?qa=9701/map-nesw-oldest-not-correct>
For me it's a bug, as it worked in the past. Work well when 3 level of filter used, but not with 2 or only the country level like indicated in the reference here above.
By the way, how could we change a flag or flag a comment? is it possible in place of doing like this: opening a new bug report?