The bulk calculation for price matrix is correct on product page but when added to cart the calculation is based on the variation price in Woocommerce – therefore incorrect.
Your demo site for this option is also showing this error.
Also the price under the title on product page is showing the variation price and not the range of prices from the price matrix table.
I have now removed Ajax for single product items to make this work BUT this takes away a lot of functionality in my theme,
Is there another way to get price matrix to work and retain the add to cart functions from Ajax?