Ford works in mysterious ways.
Ask for dealer for a copy of the "DORA" (Dealer Order Receipt Acknowledgement). This is the form that shows Ford does indeed have the order. Near the top (about the second line), you'll see a dealer code number (two digits, a letter, three digits, followed by the dealer name). Next line down you should see a 4-digit order number. These two pieces of information are useful for tracking your order.
Get in touch with a Ford customer service rep, and ask them for your order status. A PM to "FordCustomerService" on this website has always produced a quick response for me. You can also find them on Facebook, or on the phone. There's a volunteer at blueovalforums.com that will give you status updates as well.
It generally takes a while after the order is submitted for Ford to commit to building it and give it a build date. (For instance, I placed an order on Sep 28; only last week did it actually get scheduled. That was for an ST, though; SEs are both higher volume and without the same backlog, so there's a good chance you'll wait less time.) Until they do, nobody knows exactly how long it will take. You get to be patient.
The first sign of committment is assigning the order a VIN. This means Ford found all the parts in the shed out back and is definitely going to assemble the car. Shortly thereafter, the car should get a "build date" for that assembly to occur. The build date can also be found on the window sticker (which you can get on the web once you have the VIN). The build date has an accuracy about to the week, not the day, but it's usually pretty reliable.
Once the car is built, they have to ship it. The time it takes depends on how they do that -- car carrier, rail, etc -- where you live, and mysterious factors known only to Ford and the railroads. I see you're in Canada, which means most of what I think I know from the US may be irrelevant. But shipping might take two or three weeks from Michigan to California. I'd expect it to be a little faster to Ontario, but not necessarily a lot faster. I've seen reports from people living in the town with the assembly plant that still take weeks to get to the dealer. It's not the speed of just driving there; it's the shipping process.
Overall, the minimum time from order to receipt of the car is probably 6-8 weeks. 12-15 wouldn't be unusual. From your build date, probably around two weeks.
Your dealer can probably come up with a better estimate of shipping time if you press them. The salesmen probably don't know (or care); they probably order every week and inventory shows up whenever. But there's an ordering manager working there somewhere that could try looking up their last few Focus SEs and get you a better idea.