Same background for all desktops

[Macxim]

So, apparently the script changes the background on all my desktops.

[default]
image_chooser=random
image_scaling=fit
subreddits=EarthPorn:top:15:month

Here is what prints /usr/sbin/system_profiler SPDisplaysDataType

Graphics/Displays:

    Intel HD Graphics 4000:

      Chipset Model: Intel HD Graphics 4000
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x0166
      Revision ID: 0x0009
      Metal: Supported, feature set macOS GPUFamily1 v4
      Displays:
        Color LCD:
          Display Type: LCD
          Resolution: 1366 x 768 (WSGA - Wide eXtended Graphics Array)
          UI Looks like: 1366 x 768
          Framebuffer Depth: 24-Bit Color (ARGB8888)
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: No
          Connection Type: DisplayPort
        DELL U2414H:
          Resolution: 1920 x 1080 (1080p FHD - Full High Definition)
          UI Looks like: 1920 x 1080 @ 60 Hz
          Framebuffer Depth: 24-Bit Color (ARGB8888)
          Display Serial Number: 292K46BH1E0L
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: No
          Connection Type: DisplayPort

Also, it doesn't seem to find images with the appropriate ratio for both screens:

External monitor

Computer

Thanks for the help