I have seen this as well, but I have also seen posts newer than mine show up. I just assumed that the staff deemed my posts unfit to display there, for some completely opaque reason, and delisted them.
Ah, I see, thanks for sharing! I suppose it's not a bug, then.
Is there a way to filter by tags when looking for articles to read without specifically using the landing pages to do so? I've also tried the sidebar, but it hasn't worked. If there is a way, please let me know. Much thanks~