Application Launcher Questions

I need a bit of help to figure out how this works...and what went wrong. I'm running F15 64 bit, KDE. I've got the "Application Launcher" on the "Default Panel" set to "Classic Style". I wanted an icon for LibreOffice Writer on the Panel. So, from the Application Launcher I navigated to Office and right clicked on the Writer icon and picked "Add to Panel". Then, I was working on a problem related to LibreOffice and NFS. I wanted to change the icon setting for the icon that I'd placed on the panel and call the LibreOffice app in a different way. All of that seemed to work just fine..... However, when I went back to the Application Launcher there was no longer an icon for Writer under Office! So, when you add the icon to a panel and then change the settings in the panel icon...why does it "destroy" the icon in the Launcher? Also, I add it back...and I get it in KDE....but GNOME (at least in fallback mode) doesn't have Writer in its lists of applications. ?????