[Plugin: WooCommerce Table Rate Shipping] Multiple Class issues

I have a rate table that has multi-classes on it. In this problem, I am shipping a t-shirt, a mug, and a sweatshirt.

Sweatshirt has a base international shipping rate of ￡8.5 and an item cost of ￡1.5, this brings total cost to ￡10 (which is what it costs, with each additional item in the shipment adding ￡1.5 per sweatshirt shipping class item)

Mugs have a base shipping rate of ￡6.5 and a per item cost of ￡5.5 bringing shipping total to ￡12

T-Shirts have a base shipping rate of ￡8 and a per item cost of ￡1. Bring standalone shipping cost to ￡9.

If I have 1 item of each class in the cart. I want to have the shipping start calculating at the highest base / per item cost, so “MUG” then add per item costs on the rest of the cart behind that. So ￡12 for the Mug base, then ￡1.5 for Sweatshirt, then ￡1 for the shirt. This should bring my shipping total to ￡14.5.

I can’t find any combination of settings that allows this to be the case. If I only have one shipping class in my cart, and 10 of that items, it will do the base and the per item lines perfect. So a 10 order of t-shirts will be
￡19 to ship. So its calculating out fine.

My settings are in this image:
SETTINGS

Any suggestions? on a setting that will get this result? Highest row cost, then item costs only after that. This is a merge shipping example that is not in any of the documentation.