Consider the following org file:
* Tasks
** Ordered Tasks
:PROPERTIES:
:ORDERED:  t
:END:
*** TODO Module 1
**** TODO Item 1
SCHEDULED: <2015-02-01 Sun>
**** TODO Item 2
SCHEDULED: <2015-02-01 Sun>
*** TODO Module 2
**** TODO Item 3
SCHEDULED: <2015-02-01 Sun>
**** TODO Item 4
SCHEDULED: <2015-02-01 Sun>
** Other Tasks
*** TODO Random Task 1
SCHEDULED: <2015-02-01 Sun>
*** TODO Random Task 2
SCHEDULED: <2015-02-01 Sun>

What I would expect to happen: loading up the agenda shows four items:
Item 1, Item 2, Random Task 1, Random Task 2

What actually happens: The agenda shows only two items:
Item 1, Item 2.

This starts happening when org-agenda-dim-blocked-tasks is set to
invisible. What seems to happen is that the blocked tasks, even though
they are invisible, are still counted towards org-agenda-max-entries.


Emacs  : GNU Emacs 24.4.1 (x86_64-apple-darwin13.4.0, NS
apple-appkit-1265.21)
 of 2014-10-22 on burry.local
Package: Org-mode version 8.3beta (release_8.3beta-785-gb5d9f4 @
/Users/yn/dotfiles/org.emacs.d/org-mode/lisp/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-babel-hide-result-toggle-maybe
                      org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-agenda-max-entries 4
 org-default-notes-file "Capture.org"
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
                     org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-agenda-dim-blocked-tasks 'invisible
 org-mode-hook '(org-clock-load
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook org-show-block-all
append
                    local]
                   5]
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
org-babel-show-result-all
                    append local]
                   5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes
                 auto-indent-turn-on-org-indent)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-directory "~/dotfiles/org.emacs.d/org-files-debug/"
 org-enforce-todo-dependencies t
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
                  org-cycle-hide-inline-tasks org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-blocker-hook '(org-block-todo-from-children-or-siblings-or-parent)
 org-agenda-files '("~/dotfiles/org.emacs.d/org-files-debug/")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )