I installed the WooCommerce UPS shipping extension, and I also use a Flat Rate shipping class on a few of the products. We're having trouble when we have a product with a shipping class, and one without, in a cart. It should default to UPS (that's the chosen default), but instead it's using the flat rate shipping class for the entire order.
Is there a way to, if multiple products are in the cart with different shipping methods, to default to UPS? This is somewhat urgent as this site launches TODAY.