Localhost, local host, appears in Dock menu

When I click on one of the icons in my Dock, the pop-up menu lists "localhost" several times. This only happens with one application: Spark Shortcuts by Shadow Labs, which seems legit as it is listed on Cnet, and MacUpdate etc. I doubt anything untoward is going on, but can anybody explain why I currently have the word "localhost" listed seven times in the menu.