What is path and filename to the joomla file in which the initial page title is created/managed?

[bobmeetin]

I'm using the corephp blogging extension in Joomla 3.6.2. It includes an SEO plugin (all in one seo) which adds some additional fields to a post page so that you can customize the <title> and <meta description> if you wish. The title isn't working correctly.

Rather than creating a single <title> entry using your preferred title it adds a second title entry into the document head. Unfortunately although the second entry is there search engines and browsers rely on the first entry. It is also used for social sharing.

For the purposes of simplicity, if you gave the website the name, My Website, but gave the blog entry the title "It's a wonderful life", the browser and search engine (and social share) would go with "My Website". Yes I know search engines may opt to hijack the title (and description) as they see fit - ignoring that here.

I have gone through all the joomla global configuration parameters as well as the blog extension and the SEO extension - and haven't found a way to fix the title. All in One SEO is there and seemingly working.

The question: What is path and filename to the joomla file in which the initial page title is created/managed? I may need to hack the file adding an if/else clause to remove the default from showing if the page is a blog entry.

For what it's worth - normal joomla content and k2 articles are working correctly.