After doing a bunch of offline lab work, I've found that during some practice runs, I gain/lose time in increments other than 0 or 21 frames. Is this news to other Vs. SMB speedrunners? I wrote up a document which covers my findings, and my local recordings are on YouTube (can access via document) so others can framecount levels from separate runs as well.

If this is already known then my apologies, but I haven't seen any information about this sort of thing ever and was curious if this is actually the reality on what Vs. SMB "framerules" are, or if I somehow severely botched my research. Thanks!

https://docs.google.com/document/d/1PRKfbJvNYqOwmyhti2kgyRzUFrXvl3R1P0fgLzpwhAI/edit?usp=sharing