I just come back from Chile yesterday, that is the reason why I do not answer earlier, sorry.
For the payment, I made a reservation for 1 night and 4 adults with AIRBNB, as mentioned on
your ad, and I don't understand the problem, except if you wished to avoid AIRBNB fees for one room...
You must know that the travelers on AIRBNB pay in advance, no exception.
Of course, I indicate this problem at AIRBNB.