Hello,
Something pretty weird happens. I use in one page this woocommerce shortcode [product_category category="accessories,sales" per_page="24" columns="4" orderby="date" order="desc" operator="AND"]. Instead of showing two products which are on sale (two are the products that fulfill the requirements), it shows 24 products which are not on sale.
The page is here: http://update.dantemen.com/accessories-sales/
I am not sure if this is a cause by your theme, I changed to parent and it remains.
Thank you.