The correct fare per person will show up when you select 2 passengers. No need to call in. They book into P class.

Though looking at this summer's fares (which I guess may still change) it seems that it is no longer correct to refer to these as 2 for 1. So the fare for 2 people is greater than fare for one person, but still less than 2 fares bought separately. Indeed, looking at some YWG/CDG fares I can see $4200 for one person and $3200 for each of 2. So depending on dates, may not be such a great deal -- though still a saving of course. Hm. It may be that the summer fares are still in a state of flux. On verra.