Blog Troubles

When I tried to make a link for my http://groups.yahoo.com/group/Altered_stArt/ group this morning (editing previous posts) , some of my posts disappeared. Boo hoo!..... I know how to make links when creating new posts.....just haven't figured out how to do it once the post is in place. Not too savvy when it comes to this blogging stuff but I'm taxing my brain to figure it out. Don't they say it keeps your brain young to make it work harder? I need all the help I can get in that department!
ps: hope that link works.........