At the critical time(just after touchdown),control of the aircraft was in the hands of the computer,not the pilot.
I think you are confused, it APPEARS that the thrust lever on the R/H engine was never retarded in the flare (what airplane if any can be landed properly without reducing thrust at landing?), it had to make the aircraft float somewhat, then after selecting REV on the L/H engine, R/H engine accelerates to climb power. This has everything to do with the PILOT, not the computer.
(all still theory, not discounting some type of sensor failure until more facts are presented).