Folder dates wrong?

I've had a few folders showing up in My Shows with today or yesterday's date on the folder, but nothing inside the folder was recorded on those dates. And, yes, I was viewing by recent-first date order. This was on a Roamio Pro, I don't know what system version it has loaded. It seems to have started happening about 10 days ago, but doesn't happen on all shows.

Anyone else run into this bug?