We've grouped pages into categories, which helps to organize the site and build some useful lists. Some categories have templates that create automatic page layouts. Category names appear in the page address between ColumbiaCitizens.net/ and the colon. So http://ColumbiaCitizens.net/bike:downtown points to a page in the "bike" category.
Pages with no leading category are lumped in with a default group. That's fine, but if you want your page to appear with others like it, you'll need to put it in the right category.
You can change a page's category by renaming its web address. At the bottom of your page, click "Options" then "Rename". That opens a field where you can insert the category name, followed by a colon and the page name.
Examples of categories in action: