I like to have my recordings ordered by time in the Media list.

This works fine for single recordings, or episodes within a series folder. However the series folders themselves always appear in alphabetical order.

Is there anyway to sort the folders themselves by time, like you can with single recordings?

You can only sort folders alpabetically any other order would not make sense. The date the folder was created would not make work as they get deleted when you delete the last recording in them and recreated the next time you make a series recording.

That's what I was wanting though - the most recently created series folder at the top. However it seems from what you say that's not possible. Shame, but no big deal.