Wallpaper Problem

I have a problem with my desktop wallpaper.
When restarting, it changes.

In Options, I have the “US National / Infrared satelite” selected. The one that points to http://image.weather.com/images/sat/ussat_600x405.jpg

Sometimes when I restart it loads the other “US National / Infrared satelite” option, the one that points to:

Sometimes, they are both selected when I go into my options.
I would prefer to only be able to contact weather.com, maybe there is some way to delete the maps that you dont want??