Possibly a stupid question.
My husband is my companion and he just earned a companion pass too. We have upcoming flights booked so now we need to designate a companion for him and cancel flights for the new companion. I went into our reservations and on a flight that he is designated my companion, the button for him to click "add companion" is there. If I click through, it looks like he can add a companion to that flight (his designated companion's information is already prefilled).
So....can your companion add a companion too?? Pay for 1 flight but have 3 people fly. Seems too good to be true and I would hate for my flight to be canceled somewhere down the line.