Good observation. I saw this too and went to the dealer a couple of weeks ago to see if they could "turn on the memory seats". After talking to several people that had not idea, I finally talked to a service manager who said that the car must have memory seats first. You know this if there are two numbered buttons on the drivers side arm rest. Of course, this isn't an option on the THC, so we concluded that owner's manual editors forgot to delete this paragraph.
My wish is that this guy was wrong and there is a hidden, undocumented feature on our great cars, but I'm not holding out much hope.