Create users in LDAP using Django

I am having trouble with the LDAP authentification module django-auth-ldap. I am using the example configuration from this site: http://packages.python.org/django-auth-ldap/

I'd like to do two things:

1) Authentificate against LDAP: For the moment, my LDAP database is empty, I didn't add anything to it, in fact I don't know how to. However, I still am able to log in into my django-based site with my old logins/passwords stored in my django database. Why is that? Shouldn't this be ignored, shouldn't the login process occur with LDAP user/passwords instead? In other words, if my LDAP database is empty, shouldn't every single of my login fail? However, it doesn't, I have the impression that django completly ignores the django-auth-ldap module.

2) Synchronize LDAP with django (and not the other way around) I don't want to use an existing user database to authentificate against. I want to be able to create new users in Django and propagate these users to LDAP so they can be shared by other services, in my case, an openfire server. How do you do that with django-auth-ldap?

Here is the copy/paste of my configuration:

# Baseline configuration.
AUTH_LDAP_SERVER_URI = "127.0.0.1"

AUTH_LDAP_BIND_DN = "cn=admin,dc=nodomain"
AUTH_LDAP_BIND_PASSWORD = "admin"
AUTH_LDAP_USER_SEARCH = LDAPSearch("ou=users,dc=nodomain",
    ldap.SCOPE_SUBTREE, "(uid=%(user)s)")

# Set up the basic group parameters.
AUTH_LDAP_GROUP_SEARCH = LDAPSearch("ou=django,ou=groups,dc=nodomain",
    ldap.SCOPE_SUBTREE, "(objectClass=groupOfNames)"
)
AUTH_LDAP_GROUP_TYPE = GroupOfNamesType(name_attr="cn")

# Only users in this group can log in.
AUTH_LDAP_REQUIRE_GROUP = "cn=enabled,ou=django,ou=groups,dc=nodomain"

# Populate the Django user from the LDAP directory.
AUTH_LDAP_USER_ATTR_MAP = {
    "first