I'm not 100% sure, but I think that the $1.08 tax you are seeing on the order page is not tax to you as the seller, but rather the sales tax that would be paid if you were the customer. On the actual order that you showed, there is $1.29 collected from the customer; then below, there is a line for Marketplace Withheld Tax, where there is an amount of -$1.29 canceling that out (in regards to the money you see). The -$.45 is a separate entry; I assume that is the amount of tax that is cooked into the fee; as a US seller, I've never seen this entry, so I suspect that I'm paying the tax without it being broken out as a separate item.

Note that in the US, sales tax varies by state, and sometimes by city or county within states, so you will see different tax charged on orders for the same item, so that could explain why you see $1.08 in one place, and $1.29 in another.

But I'll admit as someone not familiar with the details of a non-US seller selling here, I might be mistaken or missing something important.