If you have, say, 4 items in the navigation submenu bar: When the screen width is too narrow to display all the items the responsive design switches to with "..." being a popup menu holding "Item One". As it gets narrow more items are removed from the left-hand side. So you get: with "..." now hiding "Item One" and "Item Two" That strikes me as being completely illogical. Maybe it's just me, but I tend to put the important items on a list first as I read left to right. So my suggestion is to remove items from the right-hand side first.