You can edit. On the right of you blog go to your blog control panel. Then click on where you can list all your blogs and then you will see the edit button. at that point it should bring up the blog you want to edit. Good luck
I'm finally catching up on the blogs today and saw this one. I wanted to echo what microb said about how to edit your blog posts. I do it all the time. If you have any further questions about how to do it, just let us know.