Did you guys know that on www.wowprogress.com this guild is ranked #11, not 13... anyone know what the difference is?

That site factors in a few different things when determining rank. Regular / hard mode progress seem to be the two biggest factor, combined with the dates of the kills (whoever kills it first has more points), and may even consider achievements toward progress.

If we were to put alot of our time and effort and get heroic beasts down this week, we would see a major jump from 11th, up to 3rd place.

Wow, thanks for the info, I never did understand why they were different. And I say let's down some hardmodes!!