This is turning into quite the ordeal, and it's worrying to an extent too. The thing that concerned me was this:
Which is hidden at the very bottom of
this page.
I play a US account (have done since launch, as I started playing before the EU release), I'm in the UK, and I had to get a US SE account as a result to use a token/satchel. However, I just recently changed my location/region from US to EU - My FFXI account still works; but according to the sentence above it should (will?) stop working. I'm thinking that might be the next time it trys to bill me. So it seems like the agent quoted above is giving conflicting information.
The worst part is verifying an account with my name and my friends address as I'm in the UK and not the US, so if this goes tits-up, I'm fucked.