[Orgmode] 2nd org-done when invoked from Agenda bug

[max]

$ cat ~/org-bug.el

(add-to-list 'load-path "~/org-5.04")
(require 'org)
(add-to-list 'auto-mode-alist (cons "\\.org$" 'org-mode))
(setq org-agenda-files '("~/test.org"))
(setq org-log-done t)

$ cat ~/test.org

* Not used                                                              :bleah:
** TODO one
** TODO two

$ emacs --no-init-file
M-x load-file ~/org-bug.el RET  ;; set up the test case
M-x org-agenda RET              ;; run agenda command
t                               ;; press t key to display list of todos
                                ;; the following buffer is displayemwd
-----------------------------------------------------
Global list of TODO items of type: ALL
Available with `N r': (0)ALL (1)TODO (2)DONE
  test:       TODO one
  test:       TODO two
-----------------------------------------------------
press <down> twice ;; cursor is on first TODO
press t            ;; TODO changes to DONE
press <down>       ;; cursor is on the 2nd TODO
press t            ;; Agenda buffer changes to this
-----------------------------------------------------
Global list of TODO items of type: ALL
Available with `N r': (0)ALL (1)TODO (2)DONE
  test:       DONE one
  test:       one
-----------------------------------------------------

And the 2nd TODO is not marked as DONE but remains unchanged
in the ~/test.org buffer.

Does not happen if org-log-done is not set.

Regards,
  Max