Missing topics in Memories of Yesteryears

[V_S]

I found one strange problem in 'Memories of Yesteryears' thread. The 'Last Post' column shows the last post in which sub-thread. I see now as 'Medhavigal (1955-Tamil)'. Sometimes I see '1950-1960'. But when I click the 'Memories of Yesteryears' link, I don't see the above sub-threads for some reason. I expected that sub-thread to be at the top of the page (after any sticky threads) as it was the one which had the last post.

This makes difficult to search for a thread for which we need to post. Is this a known issue or can you please look into it?

Update: Just observed all the sub-threads (topics) are there, but it is not ordered by the last post date. It is in random fashion which makes it disappear from the first page.