Well, then there must be an issue with your notifications, because I had a follow-up question in this thread: https://itch.io/t/3672771/stats-skills-questions - that was over a month ago and there was no reaction at all.
The issue with the Skill Learn System plugin is more or less resolved. Because both plugins use the term "Skill Points" for their respective advancement methods, the points gained from both plugins actually add up. I'm not sure there is a way to resolve this without renaming the Skill Points.
The Skill Learn System plugin seems to be part of Wave 5: http://www.yanfly.moe/wiki/Skill_Learn_System_VisuStella_MZ
I have a new question though, but for visibility reasons I'l do this in a new thread.