Thank you @Mark Johnson for this walkthrough; I don't know if I would have ordered PCBs without it. Well, I likely would have, I just would have neurosed over it a lot more. Your guide, and PCLPCB's website itself provided comfort. I just received the boards, coincidentally Quasimodo and UDP3.
I would like to add a couple of tips to fellow Canadian DIYers...
PCLPCB's website allows us to select our choice of currency; the displayed cost however is just the equivalent of what PCLPCB will be charging you in USD ! It is important to be aware of this if you plan to use PayPal. There was a surprise conversion to USD at the end, using PayPal's excessive conversion premium. Select USD and let your own financial institution do the currency conversion.
We all know that couriers inflict a "brokerage fee" to collect duty and taxes on behalf of the Canadian government. In the case of some of the couriers, this brokerage fee can far exceed the amount of duty and taxes collected. FedEx seems to have the most reasonable charges. FedEx told me to expect a $10 charge if duty and taxes were assessed, and nothing otherwise. My 5 Quasi and 5 UDP3 PCB's passed through customs without a charge, so no charge from FedEx - came right to my door without pain.
Back to PayPal as an aside... I once paid for a Mouser order using PayPal; I later found my entire Mouser invoice itemized on PayPal's site - every part, every quantity, the whole thing. I don't know of any other financial institution that keeps a record of anything but the bottom line - the amount they are crediting me. I drew this to Mouser's attention. Mouser was aware - it is part of their "merchant agreement" with PayPal.
I buy cat food on line using PayPal, and I find nothing but the PetSmart invoice total recorded on PayPal's site; in contrast to the Mouser invoice details. PayPal is curious about details of my electronic component purchases, but not the details of my cat food purchases. Hmmm. Is PayPal owned by Google?