Question Combustion

Its weird. Watching mekuna video, I see he got 832% at combustion passive.
I just replicated his build in maxroll but I just got 597%

Where the remaining points comes from ?
Did blizzard fixed something theses days that changed it ?

Mekuna video
https://www.youtube.com/watch?v=lMyWNB5KUs4

His build replicated
https://maxroll.gg/d4/planner/eols0007