I learned the same thing when I ha Proof Research (when they were called Lone Wolf). I was certainly upset when the rifle arrived. The guy told me it is standard in the industry because they have no idea what pad or metal you are going to use.
Since then I discovered Hastings Micro-Cell. I replaced all the 6-8 ounce pads with a 1.26" 2.9 ounce pad. So far no problems with them at all. I told Proof Research about them and MPI. MPI is now using them as standard.
Yes seems the sales guy mis spoke. I just got off the phone with them a 22" blank is 2lbs 12 oz the shilan light is 2lbs 10oz. But seems really thin. I don't lakes to them and they won't even flute a number 2 so the light number 1 is definitely a no go.