Rumours of my defeat have been greatly exaggerated

I've received a slightly oddly worded spam email from the Benn campaign.

Sent to councillors - and about local government - it tells me:

"You have represented one of the many council seats we lost."

This was news to me as I wasn't up for election this year and didn't lose my seat when I was in 2006 (in fact we haven't lost my seat in an election since 1968).

And if I had lost my seat, what would be the point in sending an email to my council email address?