You can fix errant wikilinks such as the one you pointed out in A Chorus Line (talk:A_Chorus_Line#Scott Allen) by searching for the correct page, or possibly starting your own. Then you can use the notation of [[correct_reference_page|text you want to show for the link]] (notice the vertical bar character between the linking page and the text for the page). I was reading in the Wikipedia help about how WP encourages editors not to point to disambiguation pages, and instead point to the specific page one is supposed to be referencing. And this is the typical technique (using the "|") used to do that.
Hope that helps.
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