If anyone were to be in Yone's spot right now, he would immediately report a bug upon confirming the description was off. However, when it came to Yone, he was better to know that AI making mistakes is laughable.
In fact, it would be easier and make even more sense for him to believe that an NPC is a reincarnated hidden player than to believe that the AI made a mistake.
It was that trust that reached a terrifying degree that he could keep going with the quest despite the obvious 'mistakes' in its description.
To be more precise, everyone in the mid-game after seven years from now, knew such information, and none ever doubted the AI nor reported a bug or a hacker or anything of that sort.
From astronomical money and cold conversion, to players having astonishing attributes...players never thought it was a bug after a few months into the game, but just accepted it as reality.
