I was trying to build a fire plane station and it wouldn't let me. It said I could only build three (3). The problem is that I only have two (2). What's the deal here? Did someone make a typo and only two (2) can be built? I went through EVERY fire station I have in my list and there is no third (3rd) fire plane station in the list, nor does one show up on the map. So I'm positive that I only have two.