Problem with the product discount function when switching currency

[need4speed]

I have this product http://www.2kshop.dk/product.php?id_product=48

And I have made a discount if you buy at least 50 pieces. You will get DKK 100,00 on each product.

But when im switching from the default currency DKK to EURO it only change the currency and not the price.

So as default it looks like this:

DKK 100,00

And when switching to EURO it look like this:

100 € EURO

It should be: 13,43 EURO and not 100 EURO.

Is this a common bug in 1.3.1 ?