Yes. You're correct. In my issue, I didn't have any canceled order since the beginning (I've been careful and aware about this matter). I just received the answer from CS :
"It is important for me to mention that we are aware of the issue of cancelations rectified by Customer Support affecting success scores. We recognize this oversight and are actively working to resolve it before the transition period concludes on March 14. We will keep you informed of any updates."
It looks like the new system still affecting the order which cancelled by CS to the success score 😔