Button stops working for HertzPro

I am using the Hertz Pro theme and when I am trying to add several buttons to my front page I run into a small issue. When I add buttons I run into where previous buttons stop working even though they link to different links. Is this something that I am just doing wrong. I am using the shortcode provided, but I am thinking it is when I use the class "button" that it doesn't like being referenced in two different areas. Is there something I can do to fix?