Global Tags not working on Marketpress

When a seller list products, I thought when they put tags in the tag area, which would allow buyers/seekers to click on a tag word, and then it would bring them to the product, which the tag was placed on, correct?

If that's how it is supposed to work, then the global tags are not working. When we click on tags, it does not bring us to a product. See attached

please try: http://www.militarymamasmarketplace.com