Links with Complete Addresses
You may filter the categories by area if the link has completed their address fields properly. There may be some links that have not and this feature will not work.

See All Links Again
 Remember to set both the Country and State menus to ALL in order to see  every link within the Category again.

Always Start on Page 1
If you are browsing the links by category, you will notice that there may be more then one page of links. If you move off the first page of links and attempt to then select a state or country you will not see any links at all. Filters will only work on the first page of their main category page, not the 2nd, or 10th.