I have set the list of short url of images in the image pool and also selected the "Specific image" option for homepage image rotation. But, it is stil showing the random public images on the homepage including NSFW.
I am having the same issue. Any fix or update for this as yet? When users load an image and it is set as public it randomly becomes the page background. When the short addresses are entered and 'saved', it is confirmed at the top of the window. Upon exiting the area after seeing the confirmation and realising that this has not taken the values as it should have, when you return to check the values they are no longer stored.