Next I changed to the livery G-BGKU. Same CG as before:
PA-28 Arrow III CG-04.jpg
Then I changed the weight for the back row and the passengers. But no change in indication of CG:
PA-28 Arrow III CG-05.jpg
After closing and opening the weight settings again, the old values re-appeared:
PA-28 Arrow III CG-06.jpg
That is quite strange and in my opinion broken.
Please have a look and provide a fix for this behavior.