params Id not present

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('my-route', { path: '/:id' }, function() {
    this.route('jobs');
  });
});

export default Router;

routes.my-route.jobs.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    alert('Jobs model hook should only be called once');
    const idOrName = this.paramsFor('my-route').id;
    const parentModel = this.modelFor('my-route');
    if (parentModel.jobTitle) {
      return { jobTitle: parentModel.jobTitle };
    }
    if (idOrName === parentModel.id) {
      return {
        redirectTo: Ember.merge(
          parentModel,
          {
            jobTitle: 'Correct Title',
          }
        ),
      };
    }

    return { jobTitle: 'Correct Title' };
  },

  afterModel(model) {
    if (model.redirectTo) {
      alert('Redirect called');
      this.replaceWith('my-route.jobs', model.redirectTo);
    }
  }
});

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    const nextModel = {
      name: 'nextName',
      id: '6',
    };
    let model = {
      id: '5',
      name: 'myName',
      nextModel,
    };

    return model;
  },

  serialize(model) {
    Ember.Logger.log('serialize called multiple times :(');
    return { id: model.name };
  },

  afterModel(model, transition) {
    Ember.Logger.log('paramsFor: ' + this.paramsFor('my-route').id);
    Ember.Logger.log('transition param: ' + transition.params['my-route'].id);
  }
});

// Questions:
// 1. Why is serialize called multiple times?
// 2. Why does the :id not exist after the redirect?
// 3. Why do we need a redirect for serialize to be called?
// 4. Is there a better way to change the url without copying the model?

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<p>Go to /5 to see the url change to /myName</p>
<br>
{{outlet}}
<br>
{{#link-to 'my-route' 6}}link to 6{{/link-to}}
<br>

templates.my-route.hbs

{{#link-to 'my-route' model.nextModel}}Go to Next Model{{/link-to}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}