@Susan1188
Yes, well, it appears as if marketing and support aren't well connected. It's like the left hand from one and the right hand from another.
Being clear is indeed important (critical, really), but that alone doesn't go far enough. You need to vet guests as thoroughly as you can. Ask questions, and if you sense you're not getting satisfactory answers, then you're better off to scare them away. Airbnb is very good at attracting bookings. There's another, probably better one wanting those dates. Just be patient.
There's plenty of ways to scare them away diplomatically. Demanding a hefty security deposit usually does the trick with undesirable or unsuitable guests. And even when they agree to it, you have some peace of mind at least, because they'll be much more careful if there's a wad of money hanging in the balance.
Of course, with homeshare hosts, the need and tactics are a bit different. It's a different animal altogether.