My Custom Music Styles problem is solved!
Thanks to Alec Pagida, who contacted me by mail, we found that the old version 1.1 caused the problem. I upgraded to version 1.4 and reloaded the single custom styles and now every Custom Music Stylist points to the correct custom rythm position.
It is good to have such a specialist like Alec on board of the forum. Thanks again Alec.
Bert