Inconsistency in timing compared to NeKz parser for a Portal 2 SP run

[ImAciidz]

please forgive me for my extreme laziness here, I would just explain the issue (and do some due dilligence/retest and so on), but I Unfortunately Do Not Have The Motivation For That, so have these screenshots of a conversation from January 2023 instead, otherwise this would've continued to rot in the depths of my DMs with bill xd
https://drive.google.com/file/d/1XZ_C2Kuz2ctY63xgFAajdlIte5lgT3Xx/view?usp=share_link
https://www.twitch.tv/videos/925664061