<p>Try sorting the items on list-1. Note how easy it is.
<br />Now move all the list items from list-1 onto the list-2, try to reorder them, and compare.</p>
<ul id="list-1">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
</ul>
<ul id="list-2">
<!-- workaround - do the same with this li enabled and it is fixed <li>Item 1</li>
-->
</ul>