@Jennifer3087 I think you need to list it as a private suite and make that part of your listing title - Private suite, entire first floor, otherwise you will get guests assuming they have the whole house.
And you need to describe the situation better in the beginning of your description. "This is a host-occupied property. We live in the upstairs unit and guests have the entire first floor with private entrance. So we are quickly able to attend to any issues or answer your questions, but we fully respect our guests privacy."
Something like that.