If any of the parameters 2-4 are left at 101, they will sync with whatever you set in parameter 1. Since you changed parameter 1 and left paramter 2 at 101 it is going to match what you set in 1.
Also, the list you quoted from me was the OLD and INCORRECT behavior in the old drivers (which has been fixed in the current drivers).
The correct descriptions are:
Param1 = dimming speed via zwave command
Param2 = dimming speed via paddle switch
Param3 = on/off ramp rate via zwave command
Param4 = on/off ramp rate via paddle switch
Not sure exactly what your end goal is, but if you want instant on/off (no ramping) but keep the default 3-second dimming, then you would leave Params1-2 at default and change Params3-4 to 0