If they cancel your order I would immediately contact one of the Mods at u2.com to see if they can help you. It can't hurt.
I have a feeling that there are probably MANY people who didn't notice the shipping quirk. When the adrenaline is pumping and it's 3 am, it was very easy to assume "UPS International Shipping" actually means "UPS INTERNATIONAL Shipping" and not "UPS Inter-EU Shipping". The ridiculous thing is that the cost to ship from Spain to Canada is approximately the same 40 Euros (it was 43 Euros according to the UPS site) - you would think companies dealing with events that draw international cutomers would have better procedures to deal with international orders. I would HOPE that the worst case scenario is just a pick up at Camp Nou - but sh!t am I stressed out.