Issue updating

Hey, New to WP, looked up many related issues nothing that I’ve found to be helpful yet.

Problem is as follows:
I have been granted admin access to a preset site that uses a hybrid creative theme.

There are a few changes that I have been asked to make to the homepage. Come to find the home page which currently exists as the URL with out ‘www.’ isn’t updating but instead a separate page with the Url ‘www.xxxx.com’ is being updated and created. ALSO when accessing that page the Admin Dashboard appears at the top and ask if I would like to log out when clearly I am not logged in at all.

Please help,
A Quack