During the asymptotic flare from Climb to Cruise mode, you may note that the Auto-Throttle annunciator remains in THR mode (There is no mixed THR and SPD mode). Naturally, as the climb rate decreases during this flare, the aircraft will overspeed slightly. Once in SPD mode, the A/T will reduce to apply deceleration to the correct speed, and then increase slightly to maintain it.
Regards,
Old Smokey