"Best Hist. %" inconsistent with raid log

Multiple bosses show higher parses in the raid log than on the characters “best hist. %”.
However, the referenced raid (incl dps value and fasted kill time) is correct on the character sheet (https://classic.warcraftlogs.com/character/us/whitemane/niklas).
Why are the “parse %” values different?

MC Raid, dated Nov 5, 2019:
Example: Sulfuron kill shows 96% on raid log, but 95% on character sheet.
Link Sulf kill: https://classic.warcraftlogs.com/reports/D93FxGLcqmPgJ4WM#fight=last&type=damage-done
Link char sheet: https://classic.warcraftlogs.com/character/us/whitemane/niklas

Similar for Nov 5 raid on Magmadar (98 vs 97%), Geddon (96 vs. 95%), Ragnaros (94 vs 93%).

PS: Link Rag kill: https://classic.warcraftlogs.com/reports/mkrwLKbMj2vqH347#fight=42&type=damage-done

Those are different metrics. One is historical, compared against rankings. The other is current, and compared against parses over the last 2 weeks.