I have been told that the thinking was lowest man gets dropped at each round of the leadership elections. One close to a conservative office tells me that there was a belief that there were 30-40 Blunt votes that would go Shadegg if Shadegg made it to a second ballot. And so there were the two Ryun votes, so Ryun would be the one to be ditched. Perhaps Shadegg though had a separate agreement with Boehner, thus his voluntary withdrawal?