Price in cart and checkout does not reflect price indicated in product page

Hello,

Despite having set up the plugin to apply fixed prices in all currencies, the plugin is applying an exchange rate in the cart and checkout pages. This is quite urgent as we have had two orders overnight where we have overcharged customers. Both problems apply where products have extra product options which is created by Theme High and which your documentation says you are 100% compatible with.

For example, an order in the shop page amounts to £510. When added to cart and then visit the cart page, the same product now has a value of £535.60. CURCY has added an extra £25.60

To understand where the problem is coming from, I temporarily adjusted the exchange rate for USD / GBP in the settings section of CURCY, and when I made a change to this exchange rate, the price of the product changed in the cart, despite the fact that I have checked the radio box for “Fixed Price” in the settings. Something has gone awry.

The price of the product should not change if the fixed price option has been checked, right. This is happening for all currencies except the base currency on the site.

Can someone please have a look at this urgently?