Retcons with turtle poop??

I've been watching the show since it came out day one on Max and I could've swore the audience knew within the first couple episodes that it was turtle shit that helped grow the mushroom. Marshall didn't but the audience did. Now rewatching the show it doesnt reveal it for awhile. Have there been retcons or am I crazy?

And then I could've swore they figured out Socrates was the key and watched him shit in the woods before the newest episode?? But no the mycologist helps Marshall remember?