I don't believe it will "kick down" from 2-1.
If the car is in drive, and you put it under a load, it will "kick down" from 3-2.
The transmission will auto shift as you decelerate into 1st gear as you approach a stop...
However! I feel that a properly adjusted kick down is crucial to a properly working transmission! Make sure your kick down is installed properly, and is functioning.
What year car are you working on?