Let's be honest: most people wound up deriving a home ruleset from AD&D 1E (rather than actually playing the rules of AD&D 1E) because of the combination of rambling/disorganization/stream-of-consciousness, erudite language, and conversational tone, not to mention the unpublicized addenda in later printings. Almost everyone missed something.
Of the 5 different DM's I played AD&D 1E under, each of them had simply flat out missed something different from the rest. I'd missed stuff as well. And discovered that different printings of the books have some added content in later editions.
Well, sure, but that is different than the claim that figuring out the house rules ala Mastermind is the point of the game, or that improvising solutions as a DM (recommended by the people who made the game) is somehow cheating.