Lol. Flip one of them over and you are good!
I joined 2 last night this way and it worked like a charm. Just need to remember to cut to the line on the top cross cut, right down the middle of the line on the middle, and outside of the line on the bottom cross cut. This will account for the kerf of the blade when you flip them over.
Or you can drink beer and do it twice so you don't have to think about it...