to put it simply, building graphics has x/y length and height and some of the area in that x/y are filled with data graphic that tells the game it is blank/background. thus clicking on empty spaces for building graphics should have no effect, with exception of ocean fishes due to how transparent pick is set for fishes.
this issue happens in imperial age only, can’t seem to reproduce it anything prior to imp but its hella annoying trying to set gather point.