Word will get around no matter what you do, also you are all connected with the tadpole. It makes perfect sense that the ones left at camp would know what you have been doing. I remember being annoyed with this in DA:I where there should have been a delayed approval change, here knowing immediately makes sense because they are probably spying on you with the tadpole. It seems rather manipulative and not the actions of a "good" person at all to act one way away from the person you wish to romance and then another way in their presence.
It would be nice if there was some sort of dialogue where you could explain your actions with the disapproving companion who was left behind and possibly convince them of your reasoning but I don't see this happening.
