I want to thank everyone for their help, I think I finally have things figured out. I've ordered my gift certificate from the UK site, but it still hasn't arrived. I don't typically buy gift cards, not really worrying about the little one-click charges since my bank doesn't, but I did this time to minimize the foreign transaction fees my bank charges.
About how long should it take to arrive? I thought that gift cards were delivered almost immediately, and it has been more than half an hour already.