Bests & Worsts Reviews from Amazon

I was looking for a heavy sweatshirt with a high cotton content. The description of this sweatshirt says that it is a Heavyweight Ultimate Cotton and has a 90% Cotton / 10% Polyester fabric content. It also received many positive reviews. I saw only one reviewer who mentioned that the sweatshirt they received had only a 65% Cotton / 35% Polyester content. So I posted the question to previous buyers on this site as to exactly what fabric content they had actually received vs. what is advertised... and again they (including the seller) responded and assured me that it was was indeed 90% Cotton /10% Polyester. Then why does the tag on the sweatshirt I received clearly say that the content is 65% Cotton / 35% Polyester? Isn't that a bit of bait & switch? Maybe they should include "Fabric Content May Vary" in the description.