One “-” in the header

A link to your site would help.

It’s the CSS.

Edit style.css (line 505)

#tagline {
border-top:1px solid #FFFFFF;
color:#FFFFFF;
float:left;
font-size:10px;
padding:3px;
text-decoration:none;
}

Remove the line:

border-top:1px solid #FFFFFF;