I have a kind of the same problem as the german over here. But I am from Sweden. :thumbsup:
We use normally a tax of 25%. Tax is what we call "Moms" in the pics I've included.
The first pic shows how it looks like before I have pressed "OK" button in Order Editor (2.9.1).
The second is how it look like when Order Editor has done it's job. Of some reason it include the row "Tax". I have tested with some more products and in some it split between "Moms 25%" and Tax to get the right taxamount in the end, but in this case around 25-30 kronor is lost somewhere.
Here is a screenpic from the "orders_total" table of the order in the pic above.
I have used the Order Editor 1.58 that worked before, but I can't remember if I've corrected the code for it to work.