Weird Blog Post Formatting/Bugs?

Hi

http://thorntonpropertygroup.com/blog/

My first blog post is doing weird things and no-one seems to know why?

You can see a box in the post as well as two extra characters in the post title…… “>…..

Does anyone have any idea why this is happening and how to clear it up?

Hope someone can hope. This is my first attempt at building my blog so I am really new to this.

Many Thanks

Julian