Multi Currency Plugin currency switcher not working properly

Hi,

When the plugin is switched on and used, all units and currency symbols are changed, but for some products the value isn’t changed. So for example $70 becomes £70, not £53.89. But the bigger problem is that it only happens sometimes, for some products and on some browsers. We haven’t been able to pin point why.

This form doesn’t allow me to attach screenshots, but I could send it another way if that helps.

Thank you so much in advance, waiting for your reply