Did you try it with the cable removed from the pinch bolt? If it will go down to the 11th cog with the cable removed, then I'd expect that the cable is binding somewhere. Maybe frayed up in the STI or shifter housing.
If it still won't shift itself to the smallest cog with the cable removed from the rear DR, and it shifted fine before, then you either bent the hangar or you got something wrong when you put the wheel back in.
Notice I called it a pinch bolt, got that from the OP..... I'm hoping
cxwrench likes that instead of me calling it a holdfast. <grin>