We post links to all the MyGaming news articles - this will always happen and there are logical editorial and site operation reasons for doing this. When topics are exactly the same, then they will be merged - I often do this with news articles (you may not have noticed

).
I saw your reports about the Xbox threads. What you might consider to all be about the same topic (the Xbox One) doesn't look that way to us. I see the individual topics around the Xbox One as separate. This allows people to focus discussion on a specific issue, and there is of course the general Xbox One discussion thread for everything and anything related people want to bring up. These thread topics also return in Google searches which is a good way to get traffic to the site.
That covers threads posted by MyGaming staff. While I do keep an eye on things, I can't see every thread created, and if there are duplicate topics, it helps to report them so we can take a look.