MIDI problem with the reverb "Number Springs" parameter

[Raca]

This new parameter has only 3 values on the Axe-Fx: 2-4-6.
But while working on the xml files of the old Lars editor to update them to firmware 8.08, I discovered that the Axe-Fx wants 4 values in the sysex message. The first two values both correspond to "2" on the Axe-Fx, the third is "4" and the fourth is "6".
My workaround was to put 4 values as shown on the screen capture below.

 

[Raca]

This is weird:
I am currently playing with the xml files of the NEW Axe-Edit, and this new editor does not have the problem.
It could be a bug in the old editor but all the other parameters using a list of values are correct.
I don't understand...