I wanted to start a topic on this and never did so that post will do.
But I think at the plant where they fry these chips for bags they are frying the masa and not the tortilla. The tortilla is pressed flat and already cooked hence the smooth fried chip, but frying the masa would result in a bumpier more brittle chip, like a Dorito or Tostito. I wonder if they have molds or freeze triangles or something. Maybe they are steamed or somehow precooked differently or just cooked raw. They really do not lend well to nachos, and salsas, they work, but still prefer restaurant.
I tried to google it once to no avail. Maybe one of those old "Unwapped" shows went to the Doritos plant.