This is probably just happening to me, but a single thread with just four posts has been on pages 1-2 of trending (often in the top spot) for the last few days. At the moment, it's in the top spot, as it has been much of that time.
www.mumsnet.com/talk/general_health/4713943-supplements-containing-tricaprin
I don't mind particularly, but I'm slightly baffled. Everything else is changing normally, but this one seems pinned, somehow.
If it helps, I'm on a Safari browser.