Some buildings are simply not being built. I deployed USA engineers and tried to build watch tower, anti-tank gun, anti-aircraft gun, field gun, mortar trench, MG trench but i coildn't. The construction plan simply disappears and the engineers do not build it. I have not tested this with other nations. It also happens that buildings overlap each other, because of this, engineers build one building, then begin to build a second one higher up. FIX pls