Nice work. I notice the big metal sheet around the Heatilator chimney outlet. That could be affecting reception, especially for channel 11. I would move it higher by at least a foot, preferably 29 - 30" from the last NAROD reflector.
In situations like yours, the possibility exists that the metal sheet and the Heatilator chimney could be used to your advantage, but it would take some height and distance experimentation.