This is article one, assigned to Category One. When you create a blog with a purpose, think about how you want to organize your information.

Create categories to head up topics. Your sidebar can act as your topic navigation. Category names will automatically show up in that navigation when there is a post assigned to it.

Each theme is coded to have different data appear in different areas and with different appearances. To change any of this may require you to contact someone who is familiar with altering themes in Wordpress.