We are using The N-Media Register Pro and have an issue. It seems that the following condition produces “User Name Already Exists”
If you are creating a new user on the site via the plugin. Type in a username like “newuser” then give iit a first name last name and an email. It will register.
Now delete that user from the USERS in Word Press.
Go and create a new user and try to user “newuser” as the user name. It will say, that name already exists (even though you deleted the user) but it will proceed to email the user a welcome email and validation email to verify the account.