Thank you going to all the trouble to get more specific information on the TJ flour.
Unless my eyes deceive me, at the top of the detailed specs, I believe that the protein is given as 12.8 +/- 0.20%. But in the specs for 100 grams of the flour, which I believe is an actual measured number, it looks like the protein is recited as 11 grams. That would translate to a protein content of 11%. I see this practice a lot at the General Mills flour website. As a result, in my analytical work I usually rely on the protein content per 100-gram sample. For citation purposes, I usually give the protein content as generally specified by the miller (12.8 +/- 0.20% in the TJ case).