I think it would be quite a coincidence if we weren't talking the same family. The William Robert and James Eaton seem to be a match but I have the generation prior to that as James Eaton and Catherine Willis instead of John Eaton and Margaret Craig. (The Craig family married into the Timothy Eaton family i believe.)
Another coincidence is that my aunt, Reita Eaton, married a Howard Sadler from Manitoba and later moved to Vancouver, BC. Is that your Sadler family?