When I search for a multi-city itinerary, sometimes when I get to a leg the page will not show me any options. It doesn't show me an error message or say that flights are unavailable or sold out, it just doesn't show me any options.

When this happens, the "sponsored links" box that is normally at the bottom of the page displays up near where the flight options would normally appear. Perhaps the flight options are there but "under" the misplaced sponsored links box.