Originally Posted by kwflyer

You can, just keep in mind they would be on separate ticket numbers (unless you want to pay the $90 change fee to your existing reservation).

And you would most likely have to pay the $30 phone booking fee again if you made it as a new booking (and 25/50K additional points). That is if the award availability opens up. YVR-YYZ/YUL are popular routes year round so AC only makes only some of the flights (each day) have award seats.