Bootstrap - Dropdown in UL versetzt nach oben ggü. Buttons

[Timo1980]

Hier noch mal der gesamte Code für die Navbar:

    <nav class="navbar navbar-default">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapes" data-target="#myNavbar">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>                    
                <a class="navbar-brand" href="#">Testseite</a>
            </div>

            <div class="collapse navbar-collapse div-inline" id="myNavbar">
                <ul class="nav navbar-nav navbar-right div-inline">
                    <li><a href="#"><button type="button" class="btn btn-default">Test</button></a></li>
                    <li>
                        <div class="dropdown div-inline">
                        <button class="btn btn-default dropdown-toggle dropdown-menu-center text-center" type="button" id="menu1" data-toggle="dropdown">Tutorials
                        <span class="caret"></span></button>
                        <ul class="dropdown-menu" role="menu" aria-labelledby="menu1">
                            <li role="presentation"><a role="menuitem" href="#">HTML</a></li>
                            <li role="presentation"><a role="menuitem" href="#">CSS</a></li>
                            <li role="presentation"><a role="menuitem" href="#">JavaScript</a></li>
                            <li role="presentation" class="divider"></li>
                            <li role="presentation"><a role="menuitem" href="#">About Us</a></li>
                        </ul>
                        </div>                                                
                    </li>                    
                    <li><a href="#"><button type="button" class="btn btn-success">Einloggen</button></a></li>
                    <li><a href="#"><button type="button" class="btn btn">Registrieren</button></a></li>
                    <!--<li><a href="#">WHAT</a></li> !-->
                </ul>
            </div>
        </div>
    </nav>