Issue with notifications

I don’t understand since the installation I can change notifications settings (mail or web), even delete completely my admin email but still I receive all notifications on my email address (which is no more set up in my admin profile account) from all the projects I am leading.
How come this is possible ? Conflict between what is saved as parameters which are displayed correctly and what happens concretely (old parameters still there).
Becoming mad.

the day after, today, I noticed the effect was there : as I added the cron thing, I suppose the update has been done by the daemon : is it correct ? Is any change in configuration effective only after the cli cronjob ?