Ember Guide - Deleting Todos section Bug?

I’m at the Deleting Todos section of Ember’s getting started guide.

I’ve notice if I delete todos and then add a new todo, all my deleted todo shows up!

If I try to delete my deleted todos again, I get this error:

[12:12:22.285] Error: Attempted to handle event deleteRecord on Todos.Todo:ember351:2 while in state rootState.deleted.saved. Called with undefined @ file:///home/anthony/Public/ember_todo/js/libs/ember-1.0.0-rc.3.1.js:7168

I can also replicate this behavior on the official ember getting started guide.

What’s a solution for this? Thanks!