BUG: multible resources spawning

Hi,
for example a unit with a sickle can cut a corn plant and you will get 2 food (in1 out 2)
When you have 6 farmers cutting a corn plant at the same time (in1 out 12).
Same thing happens when chopping wood or hammering stones.

I mean it's fine when it's intended to be this way, but I'm not sure about that.