@Kadogo0
Welcome !
I looked at your listing, but it seems to me it needs some tuning.
You offer a room, but you have only 1 listing for max 14 guests.
IMO you need to create a listing fo each room (or combination of rooms)
Now 1 person can book and then nobody else can book another room.
Also when 1 booking is made for 14 guests, the price is the same as for 1 guest !