having the same issue, I clearly have dates available and open in my host calendar, but when I look at a preview as a potential guest, there's a whole week blocked off, tech support provided no solution, incredibly frustrating... tried everything from blocking/opening the dates, changing prices, de-listing and re-listing the apartment, nothing works
the only temporary solution I came up with was to create exact copy of the listing and use a new calendar... unfortunately the new listing has 0 reviews