When you have a command block set to clone (move setting, destination overlap start) a large area, if you hook it up to a lever and flick the lever a few times, continually activates and even if you destroy the lever it doesn't stop
What I expected to happen was...:
I thought it would clone it twice if I right clicked the lever 3 times

What actually happened was...:
It constantly cloned it, going a block or two at a time (same each time), and when I destroyed blocks that it would clone, it sometimes showed that I had in the new one, and sometimes didn't. I usually am able to make it recognize that I destroyed the lever, but it just continued.

Steps to Reproduce:
1. Create a fairly large, around 10 by 10 or larger, with a /fill command, with the hollow argument
2. put a command block in a corner, (impulse, non conditional, needs redstone) set to clone the entire area to a destination that mostly overlaps the start, with the move argument
3. connect it to a lever and flick the lever 3 or more times