Continued calendar glitch...

I actually FIND a multi-segment trip available at 25K...
LAX-ATL on 8/7
ATL-CLE on 8/8
CLE-LAX on 8/12
(regular round trips unavailable)

Twice - I went through the booking, only to get the message - "this flight has now sold out."

When I go to re-create the search, the first time I again get the message on the first leg:

There are no flights available for the day requested.

But it only appears once each time.

I can't be certain the flight has REALLY sold out, so I will continue to rinse and repeat....