Before posting articles please have a look at the basic editing topic, it explains the basic markup for creating a page and on the second page it explains how to make a new wiki page.
Wiki pages are grouped; as you can see at the top of this page this page is the page Wiki Help in the group Help. As a page author you decide what group your page will end up in by using the notation GroupName.PageName or GroupName/PageName. To keep a little structure in the wiki please consider the group name for your article.
The dot (.) and slash (/) characters should be avoided in group and page names .. it'll mess things up.