To me for it to be 2-1 it would need to be a loss of 160 vs a potential gain of 320.
. so if you place bet of 100 you win 100 or lose only 50 . you do not say that anywhere!
that is not relevant .
All your argument is, is they won't charge you twice on the same part of the tidemark. We know that. I addressed that on the first page. That doesn't change an Evens into a 2-1. It means you go back to an evens being evens for a while, rather than an evens being 1.4.