Having no way of knowing it was sanctioned also means having no way of knowing it wasn't. Which also isn't true, because, you know, you could've used this amazing secret technique known as "asking." It's a far better approach than being a cop.
I know you're trying to apologize, but it doesn't seem like you understand that jumping to accusations was the problem, not you simply being factually wrong.
And that's forgetting the fact that it's very obviously a fan game.