SO i'm no Joomla expert by any means of the imagination.
My uncle has a website, that runs off Joomla and has this awkward issue.
When accessing the website without a www like so: http://website.com his title reads
<title>Title without www in url</title>
when accessing the website with www like so: http://www.website.com his title reads
<title>Title is different when www is inside the url</title>
Any ideas what's causing this?