Default order being overridden

Hi.

Whenever I have the plugin enabled it overrides the ordering I’ve set within WooCommerce. I want the ordering to be set price high – low, which works perfectly when the plugin is disabled. However, when the plugin is enabled, the order gets change to how the products are ordered in the post list within the back-end.

Any ideas? Link to site here: http://www.gatsbyjewellery.co.uk/shop/

Thanks,
Nat

https://wordpress.org/plugins/woocommerce-ajax-filters/