@Joel446 Seems to me your place is actually categorized correctly, as it is a guest suite with a private entrance, self check-in and you state that there is little to no interaction with the host. So it is an Entire place. But you should make it clear in the first paragraph of your listing info that you live downstairs, as well as in the "Interaction with Guests" section. Also, remove the photo of the house itself and only post photos of the guest space. You can also create a saved message to send to guests when they book, reiterating that while the guest suite is a private space with a private entrance, you do live downstairs.
That's about all you can do. Some guests just don't read. Even when a host lists "private room" and it's clearly just a room in the house where they live, cluless guests sometimes show up thinking they booked an entire home (Yeah, right, for $30/night. You can't fix stupid)