Yes u fortunately they would have had no idea. A quick google search about international adoption from Canada would have saved you lots of time and money since now you have adopted 2 children who can not move to Canada. They will have difficulty ever travelling to Canada as well as your adopted children.
I did search for international adoption canada, but it appears adoption by convenience is not the common term used in description.I did not find anything related relatives adoption. I think i should have asked canadian lawyer beforehand.
Anyways thanks guys for your help. Really appreciate it.