I checked and tested 4 times to register with the same account.but the site didnt noticed that cant register with the same account.and the user is not getting any registration email after each register.
and I(admin) didnt get any notification about a new user too.
I (admin)had got notification email when I set up a topic yesterday.
i can create new user accountA successfully via wp dashboard.
and admin and user accountA got the notice email .
the user accountA got the registration email .
but user accountA cant login .