That old thread link was working with some of your changes (earlier), but now goes to the 404 page.
Okay this one may be able to be fixed but I am not sure. The problem is most incoming links have an & after the post number and the redirect is looking for that. These types of url's don't have an & at the end so it's confused . Let me think on that one...
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Change is inevitable, how you handle change is controllable - J. Strong