Of course. It's all a matter of CSS. I checked your website. The underlining is forced on some areas and deactivated on others by your template CSS.
That's defined in the file
shoptest.avaray.com/templates/Shop_3columns/css/style.css
where you will find such code:
.BlockContent-body a:visited, .BlockContent-body a.visited {
color:#818C7D;
font-family:Arial,Helvetica,Sans-Serif;
text-decoration:none;
}
The text-decoration option is defining that.
