Just found out about it! It's because your passport will expire before you process is done. You'll need to renew your OWP and your passport for your process be finished.
It says it's taking about 32 months for the live in caregivers receive their PR.
I just wanted to share it with you all, I've reading all your posts and hoping for my OWP to arrive. And it arrived today!
Sent: May 23,2012
Received: May 25,2012
OWP by mail: August 21,2012
I am single and live in BC! Good luck to you all!