Response from Nicolas:
I was happy to provide you and Rod extra privacy since I was able to arrange other accomodation for myself. As to the price, quite simply, the reason why it was more expensive for the two of you is because there is a 30€ per night fee for an extra guest (as it says in the "Extra people" section on my listing). The lower rate you mention is for one person. I'm sorry you misunderstood this fee. It was a pleasure to host you, and I hope the rest of your trip was a success.