What if you go to another desktop and then reduce the number of desktops to 1. Will the current desktop become desktop 1?
Unfortunately the one remaining desktop is the one I don't want
I don't know what else to suggest other than creating a Dolphin link and placing it over the dud icon. A dolphin icon works the same as the home folder icon.
Make sure your desktop is in folder view then find Dolphin in Kickoff or whatever launcher you're using. Don't use the favorites launcher. It won't work. Find the one under "System." Right click on it and select "add to desktop" Place it over the dud icon.
I know it's not a fix but it's cosmetic and functional for the time being.