edited to note:
If you want to find threads you have posted previously in these forums, just click on your username on the top right when you first come here. Its says, "Welcome changingcaitlyn"
You can see what anyone else has posted here by clicking on the word under their username. In your case and timethief's "member;" in mine "moderator;" or sometimes "staff" "happiness engineer" "theme wrangler" or other…

There is only one main page for posts in a blog and all posts will display on the main blog page. There is no way to exclude posts from the main posts (blog) page.

The front page of the blog by default will display your posts (not pages) in reverse chronological order, with the most recently published post on top.

Though there is only one dynamic page in a blog for posts and we cannot post to more than that one page, we can create the appearance that we have posted to more than one page.

We organize posts by assigning categories to them. You can create a custom menu and add the dynamic automatically updating categories pages created by the software into the custom menu.
http://en.support.wordpress.com/posts/categories/
http://en.support.wordpress.com/menus/
http://en.support.wordpress.com/menus/#adding-category-pages-to-your-menu

Here’s a link to a custom menu walkthrough > http://onecoolsitebloggingtips.com/2011/08/11/wordpress-com-custom-menu-walk-through/

There are many common errors, misunderstanding and misconceptions when creating custom menus and you can read about them here > http://wpbtips.wordpress.com/2011/12/19/custom-menus/