monk discipline question

[dokkho]

I haven't played a monk on live and i just hit 53 today. So i have the 3 followings disc :

- Stonestance, 51, (4 min reuse)
- Thunderkick, 52 (10 min reuse)
- Whilrwind, 52 (40 min reuse)

Till 52, the disc worked as i thought they should, just can't use 2 at the same time. Now that i hit 53 and tried to use Whilrwind, it made Stonestance on cooldown and took 40 minutes to be able to use stonestance again (instead of 4 min refresh). Is this how it is supposed to work? Seems strange to me and in this case Whirlwind is kinda useless..