Hi George,
The Visual Editor is the editing window where most folks write their posts. It has a row of formatting buttons above the window, and you'll see the "Visual" tab active, as you see here:
http://en.support.files.wordpress.com/2012/11/visualeditor.png
Here's more information on the Visual Editor:
http://en.support.wordpress.com/visual-editor/
If your text still isn't wrapping as you compose posts, would it be possible to upload a screenshot to help in troubleshooting, so I can have a look for clues?
Here's a guide on how to make a screenshot, if you're not sure: http://en.support.wordpress.com/make-a-screenshot/
You can upload the screenshot in your Media Library so I can see it. Thanks.