Yes yes, Prima's a terrible inaccurate guide maker.
It's like a broken record in here! xD I've never even noticed the errors in my guides before.
I honestly doubt that the guide makers go through the coding with a fine tooth comb to make sure they have every single bit of information they can get. These are human beings making the guides, not reploids for crying out loud! Of course there are going to be errors. Nothing humans make are perfect. Not even machines can make perfect products all the time, hence when cars and other such things break down. And why you have spelling errors in books on the rare occasion.