Hacker Array- multiple hacks of the same resource

I was messing around and decided to hack silicon over and over again just for fun. I built 4 hacker arrays so i queued up 4 hacks of silicon. At any given point only 1 hacker array would be operating and working on shorting silicon while the other 3 would stay idle. I tried canceling out and hacking 1 carbon, 1 silicon, 1 power, and 1 water and it worked ok so it looks like it just doesn't work with a single resource. When you're launching resources offworld you can launch the same one over and over again. Why not hacker arrays hacking the same resource?