Materialize dropdown menu shows horizontal scrollbar rather than expanding past its parent when the text is longer. Anyone know why? - materialize

Question

I seem to be able to find the question posted on here and google about the same issue in bootstrap, but i'm not able to find answers for the same issue in Materialize
I'm new to bootstrap and everything i've tried hasn't solved it. I'd be grateful if anyone knows why it's doing this and how to override it.
Thank you!
the live page is here
i've set drop downs to fire on 'about' and 'profile'
the script:
<script>
var $ = jQuery;
(function($){
$(function(){
$('.dropdown-button').dropdown({
inDuration: 300,
outDuration: 225,
constrain_width: false,
hover: false,
alignment: 'right',
gutter: 0,
belowOrigin: true,
});
$('.button-collapse').sideNav({menuWidth: 240, activationWidth: 70});
}); // end of document ready
})(jQuery); // end of jQuery name space
</script>
nav bar:
<nav>
<div class="nav-wrapper">
<a class="brand-logo hide-on-med-and-down left" href="http://focallocal.org">Focallocal</a>
<ul class="hide-on-small-and-down left">
<li class="text-icon">
<a class="dropdown-button" href="http://about.focallocal.org" data-activates="nav-about" title="About Us">
<i class="mdi-action-info"></i>
<span>About Us</span>
</a>
</li>
<li class="text-icon">
<a href="http://news.focallocal.org/" title="Happy News">
<i class="mdi-device-brightness-high"></i>
<span>Happy News</span>
</a>
</li>
<li class="text-icon">
<a href="http://action.focallocal.org/" title="Action">
<i class="mdi-action-get-app"></i>
<span>Action Centre</span>
</a>
</li>
<li class="text-icon">
<a href="http://activities.focallocal.org" title="Activities">
<i class="mdi-maps-directions-walk"></i>
<span>Activities</span>
</a>
</li>
<li class="text-icon">
<a href="http://gather.focallocal.org/" title="Gather">
<i class="mdi-image-flare"></i>
<span> Gather </span>
</a>
</li>
<li class="text-icon">
<a href="http://shop.focallocal.org/" title="Shop">
<i class="mdi-action-shop-two"></i>
<span> Shop</span>
</a>
</li>
<li class="text-icon">
<a class="dropdown-button" href="#" data-activates="nav-projects" title="Projects">
<i class="mdi-action-info"></i>
<span>Projects</span>
</a>
</li>
</ul>
<ul class="right">
<li class="text-icon">
<a href="http://discuss.focallocal.org" target="_blank" title="Chat">
<i class="mdi-communication-dialpad"></i>
<span>Discuss</span>
</a>
</li>
<li class="text-icon">
<a href="https://trello.com/invite/b/SwMdGGcX/dbf6c3cebca7e2214ac0df3a57b1881f/build-the-movement" target="_blank" title="Missions">
<i class="mdi-content-create"></i>
<span>Missions</span>
</a>
</li>
<li class="text-icon">
<a href="#" title="coming soon">
<i class="mdi-action-perm-media"></i>
<span>Profile</span>
</a>
</li>
</ul>
<ul id="user-dropdown" class="dropdown-content">
<li>Log in</li>
<li>Register</li>
</ul>
<a class="button-collapse" href="#" data-activates="nav-mobile"><i class="mdi-navigation-menu"></i></a>
</div>
</nav>
dropdowns:
<ul id="nav-about" class="dropdown-content">
<li>
About Us
</li>
<li>
Hire Us
</li>
<li>
Community Values
</li>
<li>
F.A.Q
</li>
<li>
The Road to Focallocal
</li>
<li>
Will we Succeed?
</li>
<li>
Focallocal in the news
</li>
<ul id="nav-projects" class="dropdown-content">
<li>
<a href="http://action.focallocal.org/">Action Center
</a>
</li>
<li>
<a href="http://brightertomorrowmap.com/">Brighter Tomorrow Map
</a>
</li>
<li>
<a href="http://morehappiness.focallocal.org/">More Happiness
</a>
</li>