I took a look back at your photos - found the one that shows something on the floor of the hen house then looks like there is a poop collector then your roost. from studying the plans from Wichita coop for when I build ours, i'd say you have the roost too high. looking at another photo I see you have the nesting box centered on the wall - that's not the issue. from one of the Wichita cabin photos, there are two roosting poles; 1st one is roughly even with the height of the top of the nesting boxes and somewhat centered in the henhouse (adjacent to the pop door, then the 2nd roosting pole is another 12"/18" above the 1st and closer to the back wall.
hope this helps. -Sam
hope this helps. -Sam