Retainer service showing differing amounts

[Sililos]

I have 2 retainers and wanted a 3rd.
On the page it shows 1 retainer as 1.40 Euros BUT on the payment confirmation page it then states it wants to charge me 8.35 Euros.
If i select next it says "Credit card information could not be verified.
Please make sure you have registered your information correctly."

Additionally, im in New Zealand which is nowhere near Europe, So WHY am i being charged in Euros instead of US$? Almost every game charges me in US not Euros, worse still, Euros charges me far more than the sub would cost if I was charged in US$.
Do you guys seriously think New Zealand is a part of Europe? We arent a part of the US but at least US$ is more reasonable to use, Euros suck!