So I found my mistake. If you want the technical details just ask. The previous posts were relatively close, but I'll update everything here. There is still some missing data, but now the numbers are more accurate.
Put simply, some players had significantly inflated second-half statistics, notably CP3 and Zach LaVine.
Due to missing data and smoothing, all values now are within 5-10%, but analysis and interpretation are now correct.
@NBA_Math I appreciate the retweet. Here are the updated graphics.
Trae Young @TrevorSiino
Zach LaVine (Okay, now this is more like it) @JeremyBelingon
Frank Ntilikina @dwink820
Nikola Jokic @jakevandenbrink
Ja Morant @YungNujabes
Chris Paul @BattlinRise
Devin Booker @Shakedup12
Luka Doncic @adriancp797
@danfavale I fixed it AND listened to the top ten Bucks pod yesterday