Changing the username in Joomla causes a duplicate in Moodle

I am using Joomdle 0.82, Joomla 2.5.4 and Moodle 2.3.

If I change an existing user's username in Joomla's backend, a new user record is created in Moodle which is the exact duplicate of the original user record but with the changed username. I would have thought that the username for that user should change in Moodle as well but now I am getting 2 records for the same user with different usernames.

Is this expected behavior?

Thanks for your help.

Yes, this is expected behaviour.

As Joomdle uses username to link users in Joomla and Moodle, changing the username looses that link, and so what you say will happen.

A way to be able to change usernames is:
- Change username in Moodle first (having sysnc users to joomla as Off in Joomdle config in Moodle)
- Change username in Joomla. As the new username is already present in Moodle, the accounts will be linked again.

Thanks for your prompt reply and a great extension.