Windowblinds 6: Wallpaper mode doesn't apply when wallpaper is changed

I am running with two monitors and have wallpapers at 2560x1024. Setting wallpaper mode to 'smart mode' displays my wallpaper correctly over both monitors when I double-click on a wallpaper from inside WindowBlinds. However, when using the random wallpaper feature the 'smart mode' isn't applied and my wallpaper gets displayed at 1280x1024 at each monitor.

I haven't seen any separate wallpaper mode setting for random wallpapers so I'm assuming the wallpaper setting should apply for random wallpapers as well.

Is there any know fix to this?