It is a little early on Monday, so I'm not sure that I follow what your asking. It sounds like the welder will be qualified 1/8" to unlimited, but the pqr will limit the ability to generate a wps beyond 1/4" to 1", sounds correct.
Maybe this is just the rookie in me speaking up, but I would think that the WPS developed from the PQR would have to fall in that thickness range; the WPQTR might be a different story. So the welder may be qualified to weld 1/8" to UNL, but if he/she runs that WPS, then 1/4" to 1" is the range to stay in, right? gawd, I think I just chased my tail.