Sounds like perhaps a very soft T/D as written earlier here by others, as evidenced by the air/ground logic flip-flopping which could be caused by gear tilt sensor angle cycling. I am guessing the power levers were not at idle at touchdown. If the auto S/B's were functioning properly, they would have deployed simultaneously(NTSB says they were armed), with the A/G logic when it first changed to ground.....IF the throttles were both on the idle stop.
On dry and long runways, if stabilized approach, on glide path; a soft touchdown in the first 1500 feet of runway to me was a fine accomplishment. On wet, slippery runways AA has taught (drilled it in) for decades for pilots to plan for and fly a firm touchdown within the runway touchdown zone and quickly and efficiently apply up to maximum aerodynamic braking, wheel braking and thrust reverse. AA has for years now required thrust reverse on all landings.
NTSB interim report....
"Examination of the auto speed brake mechanism in the cockpit pedestal found that the linear actuator aft attachment was improperly installed and was missing a bushing. This loose connection allowed the cam to be rotated slightly relative to the switch, which could cause the switch roller and the notch in the cam to not always align. System operation with this condition present is being investigated."