Код:
<nav id="top" class="navbar navbar-inverse navbar-fixed-top">
<div id="mob_logo_div" style="height: 89.0209px;">
<img id="logo_mob" style="height: 89.0209px;">
</div>
<div class="navbar-header">
<div id="mob_logo_headdiv" style="height: 0px;">
<img id="mob_logo_head">
</div>
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul id="navigation" class="nav navbar-nav">
<li id="desk_logo_li">
<a href="/" id="logo_desk" style="height: 197px;"></a>
</li>
<li class="active"><a href="#">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">Nav header</li>
<li><a href="#">Separated link</a></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
</div><!--/.nav-collapse -->
</nav>
Суть проблемы изложена в теме. из-за чего так происходит?