Hi arturb,
Yeah, we are glad that you figured it out the settings.
<blockquote>Every main menu selection has an option for default or Home page, what is happening on the website is that the link I select as default adds an extra content to the home page that I cannot possibly turn off or locate it. </blockquote>
You are right, it is related to the defined layout (Home, Default …) of the template styles being assigned to selected menu items. And the extra concent always appears when you assign the JA_Fixel_Default to Home menu item or as a default template since its Default layout contains the “component” section.
In order to help you to use our T3 templates more easily, i ‘d recommend you to refer our offical T3 documents at http://t3-framework.org/documentation.html , it may be helpful for you in some cases.