I've also noticed this. For example I put both the solar panel roof texture and the flat solar panels all over the roofs of all Foxbury buildings, and changed the walls and floors to avoid anything with industrial eco footprint. Then when I clicked on the eco footprint icon in the world view it said that all those lots are neutral. I did similar things, like putting the solar panel roof texture, the grass roof textures, the solar panels, the wind turbines etc on buildings in all worlds, and the lots stay neutral until I travel there and stay there for at least a sim day.
Sadly, this is intentional.
