I’m sorry if my original post made it sound like this was a bug. Also, I couldn’t find any of the other posts (maybe I didn’t use the right search terms) or I would have definitely posted there.
Either way, I agree that it prevents stale post listings, but there has to be a better way that reduces user confusion.
I have put together a really quick mockup that adds usernames below the post. I don’t know if this is the correct answer (admittedly it is a little bit busy) but it maintains post attribution better than the current style.