Currencies mismatch in order

[DJ_Ironic]

Hi, 

I have really big problem with multiple currencies. I have PrestaShop 1.6.1.5 (can't update because of the template used ).

And sometimes, eshop will switch from EUR to CZK (Czech crowns..our local currency) and it will convert the order in 1:1 rate, so today... Order with product listed under pice 18 CZK (instead of 18,36 EUR) appeared...the rounding of 0.36 is also weird.

Order looks like this:

 

As you can see, my order says 18 kč instead of 18.36 € on the Unit price row, but all the prices as suma of products, shipping and Total are in CZK, but converted with the right rate.

I don't understand what is wrong here and how i does happen.  

1.6.1.5