Initially I just tried to edit one of the current posts. However, when I tried to update the permalink to match the title of the new post, it disappeared. I figured the best thing to do was just start fresh with a new post. This worked fine so I decided to delete the remaining posts so I could replace them with new information (the posts serve as a news/updates section on my website). I believe it was after I deleted all of these posts and left only the new one I created that the problem started.
Downloading and installing a different version of WordPress will solve this issue? Will all of the content and functionailty of the web page be maintained? I guess I am wondering how installing another version will allow me to regain the functionality I lost. I thought maybe you could do the same thing with WordPress that you can do with computers in which you have a restore point that takes you back to a time when everything was working properly.