Building on rocks in Tonoa (Possible Bug)

[SaintZ 119]

So, maybe this was intended but, i put a flag ontop of a rock ontop of a mountain of rocks so that i could build up there.

I try to place an item (directly next to the flag) and it tells me "you are in enemy territory"

So i hit show radius, ....and the radius is all the way on the ground...so i wonder...is it telling me I'm in enemy territory because the radius isn't even reaching the flag?

From what i understand the radius is supposed to be a bubble with its center being the flag pole. I figured out that i could build below the flag pole but would get the message still every now and then, just had to move around and find a spot where i could construct then move that construction to the proper spot.