Ciao Ridoku,
I'm a user like you, than we have to wait a confirm from JA team.
I don't know which template you are using (this is the section dedicated to Purit IV).
However, if I understand correctly, your problem right now is that when you open an article from the home page, the article is displayed using the same layout as the home page.
If I remember correctly, you can configure the layout to use in subpages or subelements. That is, you can configure so that all articles that are opened from a specific page or menu item use a specific layout.
So if you have a "module" on the homepage or a menu item configured to show the list of articles, you can configure the layout to use when viewing a single article.