Q. I just published a new page. Why isn't it showing up on the other pages in the same section?
A. When publishing a brand new page, you want to publish the entire folder it resides in. That will ensure the new page shows up in the left-hand navigation of the other pages in the same section
Q. I just deleted a page. Why is it showing up in the top navigation of my site?
Since the top navigation is on every page of your site, any changes to first and second-level topics require a full site publish. This includes adding a page, deleting a page, or changing the display name of a folder or page.
Read more about publishing pages.