Gonna toss out something that seems more obvious now that we've reached a conclusion:
"Episode 66" and "Season 2, episode 1"...kinda mean the same thing.
Someone probably tacked "Season 2" onto the former somewhere along the line because...well, who knows why, really? With as goofy as this whole thing turns out to have gotten, it's just as plausible that it came from the fanfiction side of things as it is that it was a misinterpretation or a typo.
Regardless, you did a good job here, Christian. The right conclusion not being the one you wanted to reach doesn't make the fact that you reached it any less of an achievement.