I'm building a simple backbone app that have 4 routes: home, about, privacy and terms. But after setting the routes I have 3 problems:

The "terms" view isn't rendering;

When I refresh the #about or the #privacy page, the home view renders after the #about/#privacy view

When I hit the back button the home view never renders. For example, if I'm in the #about page, and I hit the back button to the homepage, the about view stays in the page

I don't know what I'm doing wrong about the 1st problem. I think that the 2nd and 3rd problem are related with something missing in the home router, but I don't know what is.

Here is my code:

HTML

<section class="feed">

    <script id="homeTemplate" type="text/template">

        <div class="home">
        </div>

    </script>

    <script id="termsTemplate" type="text/template">

        <div class="terms">
        Bla bla bla bla
        </div>

    </script>   

    <script id="privacyTemplate" type="text/template">

        <div class="privacy">   
        Bla bla bla bla
        </div>

    </script>

    <script id="aboutTemplate" type="text/template">

         <div class="about">
         Bla bla bla bla
         </div>

    </script>

</section> 

The views

app.HomeListView = Backbone.View.extend({
    el: '.feed',

    initialize: function ( initialbooks ) {
         this.collection = new app.BookList (initialbooks);
         this.render();
    },

    render: function() {
         this.collection.each(function( item ){
         this.renderHome( item );
         }, this);
    },

    renderHome: function ( item ) {
         var bookview = new app.BookView ({
         model: item
         })
         this.$el.append( bookview.render().el );
         }  });

app.BookView = Backbone.View.extend ({
    tagName: 'div',
    className: 'home', 

     template: _.template( $( '#homeTemplate' ).html()),

    render: function() {
         this.$el.html(this.template(this.model.toJSON()));
         return this;
         }  
 });

app.AboutView = Backbone.View.extend({
     tagName: 'div',
     className: 'about',

     initialize:function () {
         this.render();
     },

     template: _.template( $( '#aboutTemplate' ).html()),

     render: function () {
         this.$el.html(this.template());
         return this;
     }
});

 app.PrivacyView = Backbone.View.extend ({
     tagName: 'div',
     className: 'privacy',

     initialize: function() {
         this.render();
     },

     template: _.template( $('#privacyTemplate').html() ),

     render: function () {
         this.$el.html(this.template());
         return this;
     }
});

 app.TermsView = Backbone.View.extend ({
     tagName: 'div',
     className: 'terms',

     initialize: function () {
         this.render();
     },

     template: _.template ( $( '#termsTemplate' ).html() ), 

     render: function () {
         this.$el.html(this.template()),
         return this;
     }
 });

And the router:

var AppRouter = Backbone.Router.extend({
     routes: {
         '' : 'home',
         'about' : 'about',
         'privacy' : 'privacy',
         'terms' : 'terms'
     },

     home: function () {
         if (!this.homeListView) {
             this.homeListView = new app.HomeListView();
         };
     },

     about: function () {
         if (!this.aboutView) {
             this.aboutView = new app.AboutView();
        };
         $('.feed').html(this.aboutView.el);
     },

     privacy: function () {
         if (!this.privacyView) {
             this.privacyView = new app.PrivacyView();
         };
         $('.feed').html(this.privacyView.el);
     },

     terms: function () {
          if (!this.termsView) {
             this.termsView = new app.TermsView();
         };
         $('.feed').html(this.termsView.el);
     }
 })

 app.Router = new AppRouter();
 Backbone.history.start(); 

I'm missing something but I don't know what.

Thanks