Sorry, used the wrong verb, Extend the displays. Again the ability to put Image A on Display 1 and Image B on Display 2 worked fine in Deskscapes 8 and only stopped working when I upgraded to Deskscapes 10. Reverting back to Deskscapes 8 , the feature still works.
Hmmm, I think I have been able to reproduce what you are seeing but it involved using Windows to set the wallpaper in the mix:
As you can see, DS works fine to set unique ones until I set the wallpaper with Windows, then go to DS to set it to 1 - that is when it fails as you describe. If I use DS to set it to all monitors, then pick another to set it to 1 monitor, it works again.
Can you reproduce what I am doing?
Stardock Customer Service Manager