Hello,

Have you disabled the responsive mode in this site? I suggest you enable it again so the site content is scaled properly in mobile. To rever menu style from mobile to normal, add this css into Specular > General Options > Custom Css:

@media (max-width: 979px){
.mobile_small_menu {
    display: none !important;
}
header#header #navigation{
    display: block !important;
}
}

Best regards!