Jesus Fricking Christ... you are totally right. Just tested it and it works perfectly. In part it's our fault for not reading the tooltip, but it's not intuitive to give it such a simple name which, I think, in most games means something else, more so when most people talk about "Call to Arms" (the button should be called like that). Btw, what does Occupy Turret do? The tooltip is not clear enough, and I can't find any specific info. Maybe I just haven't come across "turret points". Also, as per one of my previous suggestions, a "Capture" button should be added.
It's very beautiful, but some areas have a lot of detail.
I started playing around with some concepts.
You should keep the image backgrounds simple so they work.