Whats up with their site? The drop downs only list months through October, but if you click on the calendar you can see that they have some fares loaded out through November 17th (the dates are gray after that), but when you click on a date in November it won't take it because the drop down only goes to October.
I didn't look but maybe they're just loading in new dates. They load really slow sometimes...they usually start with the higher fares & work backwards to the cheapest. Maybe you just caught it before they were done?