The aircraft behaved as designed. Alpha floor is a function by itself it has following requirements:
The FAC sends this signal when:
‐ The angle of attack is above a predetermined threshold, that is a function of the configuration.
‐ In CONF 3 and CONF FULL, this threshold decreases as a function of the aircraft deceleration rate (down to – 3 °).
Alpha-floor is available from lift-off until the aircraft reaches 100 ft. RA in approach.
At 2000ft. wind shear alert would not be triggered. It has it's own conditions.
The windshear detection function is provided by the Flight Augmentation Computer (FAC) in takeoff and approach phase in the following conditions: ‐ At takeoff, 3 s after liftoff, up to 1 300 ft RA
‐ At landing, from 1 300 ft RA to 50 ft RA
‐ With at least CONF 1 selected.