Challenge Mode BUG: +500% Haste ruining times

There's currently a major bug somewhere (I personally do not know where) that's granting players a +500% haste buff that's allowing groups to complete all 8 challenge modes in insanely ridiculous times, regardless of gear or talent specializations.

Just look at these times (armory is buggy):
Shadowmoon Burial Grounds: 14:02 -- Three tanks, a warlock, and ret paladin. That's 3 minutes and 30 seconds ahead of the timer nearly 20 points below the intended item level for challenge modes.

Here's a few characters:
http://us.battle.net/wow/en/character/blackrock/Kami/advanced
http://us.battle.net/wow/en/character/kelthuzad/Anpylol/advanced (618 item level)
http://us.battle.net/wow/en/character/kelthuzad/%C3%82meyuri/challenge (620 item level)

There are plenty more examples for both times and characters, but I could spend all night finding and linking them.

And if you're questing the bug -- here's a screenshot of the attributes page:
http://i.imgur.com/QiGKxkq.png

As you can see... +548% haste.

I assume something will be done about this? It takes a lot of fun out of the game when you can simply use an exploit and take what's supposed to be a challenge (no pun intended) and make it easier than a normal mode.