Reversed orders

Hello author,

I have a problem with Quantity Discount by Steps rule.

If steps rule from low to high then Cart Total has wrong value.
But if steps rule from high to low then Order is not good.

Could you please fix it?

This order is working but not good for display: https://drive.google.com/file/d/1Qu5zDyhUm2R6M6lRTQumbyc-lJf09weM/view?usp=sharing