Ricki Carrol's book says that those recipes worked for her, but as you learn more about cheese making you have to start checking the acid and ph stuff. I think that was in the book, or on her website. I have two cheese books too, Ricki Carrol and an Artisan one, and I look at the recipes in the book and look up the cheese on the forums to see what problems other people have. There is a lot left out of the books. Of course you wouldn't be able to carry the book if it told everything.
Lowering the temperature would slow down the aging process, and since you have to keep it for 60 days because of the raw milk thing it does make sense to lower the temperature.