You are not missing anything.

Yup, I have a clamp above the problem solver and below the stempost. If you look at pix in post

#266 you can see headtube, headset (silver), problem solver (black), clamp (blue), stempost.

Maybe Jur put the loose clamp below the problem solver,then clamped the stempost above the problem solver, adjusted the headset, clamped the clamp below the problem solver, loosened the stempost, removed the problem solver, replaced the stempost above the clamp.