Hi Jeremy
The site in question is http://kempstonrecruitment.co.za/, I resolved the issue with Jetpack by disconnecting and reconnecting my wordpress.com account in Jetpack.
Thanks for the info.
Incase it matters, after signing in as a non admin user, I connected their account to Jetpack, setup pbe and then signed in as admin. At that point my site stats didn't work. I then disconnected and reconnected Jetpack which then fixed the problem but broke the pbe. I've subsequently created a Wordpress.com account for one of the users and have setup pbe successfully on the site.
Rob