How to filter backbone collection to show tags

I'm creating a bookmarking tool that lets you create a list of stored bookmarks from an in-page form. The list will include an identifier tag (eg - Amazon www.amazone.com tag: shopping). From this created list, I want to also have a list showing the various tags that have been named.

This should probably use the filter method, but I caot seem to get it to filter a correct list; I keep getting each tag listed for each URL created so there are multiple examples of the same tag.

Here is the code that creates my form, the resulting URL list, and the module exports. This is from my Views js file:

var $ = require('jquery');
var Backbone = require('backbone');
var listTemplate = require('../../templates/addresslist.hbs');
var formTemplate = require('../../templates/addressform.hbs');
var detailTemplate = require('../../templates/addressdetail.hbs');

var AddressFormView = Backbone.View.extend({
  tagName: 'form',
  template: formTemplate,
  events: {
    'submit': 'addAddress'
  },
  render: function(){
    var renderedHtml = this.template();
    this.$el.html(renderedHtml);
    retu this;
  },
  addAddress: function(event){
    event.preventDefault();
    this.collection.create({
      title: $('#title').val(),
      url: $('#url').val(),
      tag: $('#tag').val(),
    });
    $('#title').val('');
    $('#url').val('');
    $('#tag').val('');
  },
});

var AddressListView = Backbone.View.extend({
  tagName: 'ul',
  initialize: function(){
    this.listenTo(this.collection, 'add', this.renderItem);
  },
  render: function(){
    retu this;
  },
  renderItem: function(address){
    console.log('address', address);
    var addressItem = new AddressItemView({model: address});
    this.$el.append(addressItem.render().el);
  }
});

var AddressItemView = Backbone.View.extend({
  tagName: 'li',
  template: listTemplate,
  render: function(){
    var context = this.model.toJSON();
    this.$el.html(this.template(context));
    retu this;
  }
});

var AddressDetailView = Backbone.View.extend({
  template: detailTemplate,
  render: function(){
    this.$el.html('').append(this.template);
    retu this;
  }
});

module.exports = {
  'AddressFormView': AddressFormView,
  'AddressListView': AddressListView,
  'AddressItemView': AddressItemView,
  'AddressDetailView': AddressDetailView,
}

My router js file looks like this:

var $ = require('jquery');
var Backbone = require('backbone');
var views = require('./views/addressview');
var models = require('./models/address');

var Router = Backbone.Router.extend({
  routes: {
    '': 'index',
    'detail/:id/': 'detail'
  },

  initialize: function(){
    this.collection = new models.AddressCollection();
  },

  index: function(){
    var addressForm = new views.AddressFormView({collection: this.collection});
    $('.app').html(addressForm.render().el);

    var addressListing = new views.AddressListView({collection: this.collection});
    $('.app').append(addressListing.render().el);

    this.collection.fetch();
  },

  detail: function(addressId){
    this.collection.fetch().done(function(){
      var address = this.collection.get(addressId);
      var addressDetail = new views.AddressDetailView({model: address});
      $('.app').html(addressDetail.render().el);
    }.bind(this));
  },
});

var router = new Router();

module.exports = router;