Event doubling problem

test.coffee

# Models, Foo listens to Bar's 'create' event
class Bar extends Spine.Model
  @configure "Bar"

class Foo extends Spine.Model
  @configure "Foo"

  constructor: ->
    super
    Bar.bind("create", @barCreated)

  barCreated: (foo) =>
    @trigger("update", this)

# Controller
class FooController extends Spine.Controller
  constructor: ->
    super
    @count = 0
    @foo.bind("update", @render)

  render: =>
    @count += 1
    console.log(@count)

# main
$(document).ready ->
  a = new Foo().save()
  new FooController(foo: a)

  # Here's the problem:
  # The following line should trigger the below chain of events:
  #
  # Bar 'create' handled by Foo#barCreated
  # Foo 'update' handled by FooItem#render
  #
  # it does, except Foo*upadate is triggered twice
  # as evidenced by the following console output:
  # => 1
  # => 2
  # which should have just been:
  # => 1
  #
  # what gives? thoughts?
  # debugger
  new Bar().save()

Interestingly, if I make Foo extend Spine.Controller instead of Model it works correctly. See this gist for the working example: https://gist.github.com/1368592

Leaning towards bug now.