Perhaps you can add a couple of listings to your profile, hotel option style.
Option A - 1 bedroom available ( other two bedroom doors locked)
Option B - 2 bedrooms ( one locked)
Option C - 3 bedrooms.
You can price each option more appropiately , differ the cleaning fee for each option and even block A and B out if you have peak booking periods. You might have only two guests who want separate beds and instead of having to second guess what they want or start a correspondance so this way makes it clear too.
Import/export calendars to stop double bookings too. Each option will appear in the appropriate customer search.
I think it gives you much more control of the offering and will deter chancers and rule breakers.