There is a different order of items in the subtotals of Step1 vs those in Step3.
I prefer those in Step3, which is :
This is more logical for me, and plays better with my use of discounts, than Step1, which is currently :
coupons listed out
I would prefer the shipping& handling figure always to be after subtotal, then discounts & coupons (listed or total), then tax, then total.
This is (a) to be consistent between Step 1 and Step 3, and (b) to play better with my handling of EU VAT for business users.