You are removing elements, you cannot show them if they are removed.
Replace your remove()
's with hide()
s instead.
$('#btnAdd').click(function () {
$(".RemoveSettings").hide();
$(this).toggleClass('displaying');
$('#removedcontent').show();
});
$('#removedcontent').click(function () {
$('#removedcontent').hide();
$(".RemoveSettings").show();
});