my case was started on april too and i have to leave on next september also.
what i am going to do is trying to find a job in canada and work in canada first, and then claim the address changed.
i think they may transfer my case to canada and that would be even better because the time is supposed to be shorter than here.
i am not sure either and hope these info could be helpful to you.
since we are two peas in a pod, we might contact each other directly to share the info.
sam