For some reason the tag inherited some css from other sources. I don't know from where, so i just added a few lines of css and the !important property at the end of lines. Yeah css is hard to maintain.

.contact-form > legend {
padding: 0;
font-weight: bold;
color: #333;

float: none !important;
width: auto !important;
margin-bottom: 0 !important;

}