By default Twill will disply the url of a module item to be {siteurl}/{module}/{slug}
e.g. mysite.com/pages/about. With the 'about' section being the editable slug. This is understandable as Twill knows nothing of your frontend routing. However it is likely confusing for editors, as that url presented will not be the final url of the content.
This will give us more correct urls e.g. mysite.com/about
// app/Http/Controllers/Admin/PageController
protected $permalinkBase = '';