When you add a new tab to an existing template file, it does not fetch the attributes (background color or a company logo or any such you feel to have in each page) to the new tab. For example, I created a template with company Logo and a page background with a .PNG slide having a boarder in it. The pages you create as template will be there existing. However, if you add a new tab to the file even from its template file does not bring the new pages features to it rather it creates another fresh common PBI tab. I wonder if there are any existing features that can override this issue.
-Jinu Peter-