@Viki1 strange... bc it is really easy.... if you have a listing for the whole house and then let's say 2 listings for 2 rooms which you can also rent separately then :
you have to choose the whole house first , click next, then it asks you what listings /rooms are inside that house so you mark them and that's it.
Now when someone books one room, the whole house listing is blocked as well but the second room is still available. But if someone books the whole house then both rooms will be blocked as well.
It really help us bc we can rent 2 apartments separatelly or both of them as one big apartment, so we have 3 listings . Until now we had to sinchronize / block them manually and now it is automated.