Hello,
It is aligned according to the parent menu item.
Try to add the next code in Theme Options > Theme custom CSS > Custom CSS for desctop:
.header-wrapper .et_b_header-menu .menu .item-design-mega-menu.menu-item-has-children {
position: static;
}
.header-wrapper .et_b_header-menu .item-design-mega-menu .menu-static-block.nav-sublist-dropdown {
margin: 0 !important;
left: 0 !important;
right: 0 !important;
width: 100%;
}
Regards
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