Why is this loading so many chunks?

So I have a plugin where you can place a block, (flowpot) and it protects a configured area. Now it works, it works great, but it loads a lot of chunks. I was thinking that using Location#distance(location) would load the location, but doesn't that just subtract the x, y, z, etc?
Anyways, here is the code, it is pretty big (854 lines)
http://pastebin.com/zv6FFjQm