Thanks for the discussion. There are no duplicate entries in the blog/forum. But, what the first blogger above saw was real and valid. What happens is this:
1. While viewing entries, when you click the "NEXT PAGE" button, the next 10 entries are brought up.
2. But what happens if in the meanwhile someone added a new blog entry? The last entry in the "current page" gets pushed as the first entry in the "next page".
3....
more...

So, now when you click the "NEXT PAGE" button, you once again see the last entry in the current page as the first entry in the new page. Looks like there is some duplication.
4. So, apologies for the confusion. It is the nature of the software, and it happens due to a peculiar sequence of circumstances. But, the main thing here is that this is only a "presentation problem". There is no underlying bug here.
Thanks for your patience, and we shall look at ways to mitigate the confusion when the above sequence of events happen.