this is what i think happened, not sure, but there is a strong possibility it is like this: I went to your page, and I can even still book for tonite, up til 6 or 7 days from now, so clearly, tomorrow IS available.
But sending a pre-approval to someone means that that guest must also have those dates available on THEIR calendar. guess what? lots of guests inquire about something, one wants to be helpful, even send a pre-approvl and they turn around and just book somewhere else, and you never hear from them again. While waiting to hear from them, it used to be that suddenly the status might change from "pending" to "not possible",leaving one wondering whT happened... instead of Airbnb just informing the host, like "sorry, soundso has booked somewhere else", one was left hanging......
so I think- and I believe someone her in teh forum even said so - the wording might have changed, and Airbn now just tells you, those dates are not available Ny longer