In this case, the torque spec is just there to keep you from snapping the bolt or leaving it loose enough that it vibrates out. There is a sleeve around the bolt that fully seats. It sets the exact height of the valve cover over the top of the head. This ensures that the gasket is compressed by the designed for amount, unrelated to the exact torque the bolts are tightened with.
I assume the order has to do with making sure the gasket stays in place while tightening to prevent it from being squeezed out one side