ClickOnce sometimes adds multiple shortcuts to the Start menu?

I have ClickOnce deployment for my application (Fredster). It is installed on every user on the server that every user is a member of. Sometimes / somehow, the start menu starts adding Fredster -1, Fredster -2, etc. I am assuming this is just a shortcut, the application works fine no matter which Start Menu icon is clicked for any user. But why is this happening, and how can I keep him from adding these confusing "shortcuts"? This never happens when I install the application locally.