The wallpaper settings has 2 options, missing option 3.
1) Span across all monitors
2) Use a different image for each monitor.
3) Use same image for both monitors.

Also, I was looking at the settings to make this post and now getting error on Apply:
"You have selected 'Single Image' for one of your monitors but didn't select and image file"
It is set for flickr, and has pulled images... ?
My crappy firewall was semi-ignoring DisplayFusion internet access, works better with rules.

Also, The "Warn me if my wallpaper needs adjusting" and "Fix my wallpaper without prompting" seems backwards or something... my brain would be happier with this:
"Adjust wallpaper when needed"
- "Prompt me first!"
But maybe it's just me

Thanks.