Originally Posted by GeoffR
In Preferences-->Sending Books To Devices-->Metedata management I have automatic selected, but I'm not sure if that is necessary.
Thanks, that's improved things.
Since my last post I discovered I needed to upload a new book from calibre to the Kobo for it to display series data from previously loaded books.
After making the change you suggest the series data is updated after reconnecting to calibre.
After a brief test that setting also appears to solved my problem with the Kobo displaying series data from the book in place of that in calibre's "edit metadata".