Buildings can be placed on water surface if standing on platform

[Celarious]

If standing on an ocean platform, you are able to place buildings outside the platform, on the surface of the water. These buildings appear on the surface of the water, which as far as I know shouldn't be possible:

[Deantwo]

You can also place any building type from orbit and they will appear on the ocean surface. It is probably more reasonable to at least limit placing buildings from orbit to just platforms.