@unsorted to confirm did you go to the watched threads page I linked in my previous post? Then you have to click manage watched threads. Then select disable email notifications. A dialogue should pop up that says. "Are you sure you want to update your email notification settings for all threads?" Click the proceed button.
If that doesn't work and you don't mind I can take a look at your account to help rule out the forum software as a cause.
If that doesn't work and you don't mind I can take a look at your account to help rule out the forum software as a cause.