"Tracking is not available for international registered mail items sent to Canada".
It is familiar to me status with Canada Post. I have items from USA or other countries where tracking was only available within country it was shipped from. I would not trust something called as 17track.net. Check with your postal service.
But, yes, three, four weeks for "registered mail items sent to Canada" is normal here.
Here is the item delivery progress I'm currently watching, haven't received yet:
2017/07/12 12:36 Delivered
2017/07/12 09:53 Item out for delivery
2017/07/11 14:11 GEORGETOWN, ON Item redirected to recipient's new address
2017/07/11 12:04 GEORGETOWN, ON Delivered
2017/07/11 08:40 GEORGETOWN, ON Item out for delivery
But I haven't change my shipping address for decade
I guess, you are getting the picture...