Price converting on checkout page not working

Hi!
I am having some problems with some payment fields on the checkout page, I use ‘flexible checkout field’, the prices set is not converting to other currencies correctly. The price stays the same when changing currency, only the symbol changes, so if the price is 20 Euro it gets converted to 20 SEK instead of 200 SEK.
You can view the problem here: https://dev.fredfloris.eu/
By placing anything in the cart and then going to the checkout page, the numbers in the price will remain the same no matter the currency.

Br,
Fredric