Math is weird right? With a little trick an original strategy with expectancy of -2.3, 0.8, 2 (Before spread) can turn into a system that looks like new system (But it is not) with expectancy of 7.3 pips (before spread). This is not a magic and it is completely logically sounds!
Anyway I think you already explained everything in simple but detail enough. So I guess my explanation is no longer required.
btw I believe that TraderHotch managed to find the solution too, just his explanation is a bit messy and lack of the keyword that I required.