Links to pages from navigation page.

When I go on my published site I see that the url descriptions are still appearing with old names that I thought I updated. For instance this page: http://www.candiceyates.com/Social-He... should say /Still-Lifes but it doesn't even though I updated the page name. When I went to Site Navigation Menu Settings and click on Links and then highlight the "Still-Life" page and then click Edit link and Browse, I cannot find the Still Life Page in the drop down. What have I done wrong?