Wasn't speaking directly about you, but there are 83 pages because of people repeating the same questions that have been answered over and over.
When using the search feature, you need to make sure it's set to "this thread" so that it only show you posts from the thread as opposed to the other options.
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Note that when you're on the search results page, you're no longer on a thread; so I believe it defaults to searching everywhere if you search again on that page.