Hi, I'm a long time user of Calibre, loved it from my first ereader

- I've spotted a change in the series information displayed on mine that I just can't figure out how to revert and hoping someone here can help!
I send my books the the device (Kobo Sage) with a plugboard so the title shows as Series Name Series Number Title
(plugboard {series}{series_index:0>2| | }{title})
Then, previously I know I have turned off the series information on the device so the title would display using the the first two lines above the author - but now it has started truncating the title on the first line, shows series information on the second and author still on the third - examples below:
WANTED Behavoiur
Jack Reacher 11 Bad Luck and
Trouble
Lee Child
CURRENT UNWANTED Behaviour
Jack Reacher 11 Bad Luck and.....
JACK REACHER - 11
Lee Child
I've tried all the preferences, plugins (although I did used to use Kobo Touch Extended but it's gone and won't let me install it now) and the only way I've found to stop it from showing the series information is to remove a book and resend it.
As I have 6k books on there, removing/adding them all would take forever, can anyone point me to an easier way to do this?
Fingers crossed and thanks in advance,
Liz