I have to be honnest , I stopped discussing in this forum about changing styles because knobody seemed to understand my problem, despite their efforts.

Now, I found the solution, by chance, and I wish to share it.
When programming a style for Bar #40 (just an example) I realized it was coming at Bar #80.
I tried with Bar #20 and it came at Bar #40.
So, there is a Factor 2 between what I planned and what I got.

Then I made de connection with the tempo of the styles I used.
In the Bluegrass section I am interested in, the same style appears twice.
e.g. _BLUGRG8 / Feel ev8 / Tempo 260 / Bluegrass Reso Solo 8ths @260 / Set #Half-double
_BLUGRGS / Feel ev16 / Tempo 130 / Bluegrass w/Resonator Guitar Solo / Set RT
I always selected the Style with the 8 in the name, so I guess the above mentionned Factor 2 is the reason for my concern.

Greetings