Hi Laranz,
If I move your code to below mobile navigation and above the main navigation, i.e:
@media only screen and (max-width: 767px){
#mobile-navigation{
display: none;
}
.portfolio-filter-wrap{
clear:both;
}
#main-navigation{
display:block;
margin-top: 20px;
}
}
this moves the filter back to the left of ‘portfolio’, centres the menu on portrait mobile view, but on landscape view, the menu is still moved to the right (Screen-Shot-2013-09-27-at-20.47.23.png in the above post).
So close! Any ideas on anything else I can try?