I had a number of schedule changes for my Mid-July itinerary between Mia and lax. While aa.com was only showing a couple of flights between Mia and lax, us airways website was showing the full new schedule of aa flights. but with the flights 'sold out'. I used the info from the Us Airways website to call aa and they happily rebooked me onto more suitable timings than the ones I had been rescheduled to.
All the flights are now showing as available to book on aa.com and the us airways website.