Can't figure out why the sequence is different when run without --list-tasks

Actual execution

PLAY [192.168.56.102] ********************************************************* 

GATHERING FACTS *************************************************************** 
ok: [192.168.56.102]

TASK: [Give madek a PostgreSQL user] ****************************************** 
failed: [192.168.56.102] => {"failed": true, "parsed": false}
invalid output was: sudo: unknown user: postgres
sudo: unable to initialize policy plugin


FATAL: all hosts have already failed -- aborting

PLAY RECAP ******************************************************************** 
           to retry, use: --limit @/home/rca/site.retry

192.168.56.102             : ok=1    changed=0    unreachable=0    failed=1

Relevant part of --list-tasks

  play #14 (developer_vm_madek): host count=1
    192.168.56.102
  play #14 (developer_vm_madek):
    Install python-apt (for the Ansible apt module)
    Install lsb-release
    Install requirements for managing repos via Ansible (python-pycurl)
    zip is always something useful
    unzip is always something useful
    copy src=locale.sh dest=/etc/profile.d/locale.sh mode=775
    Install locales
    lineinfile dest=/etc/locale.gen state=present regexp='^en_GB.UTF-8 UTF_8' line='en_GB.UTF-8 UTF-8'
    lineinfile dest=/etc/locale.gen state=absent regexp='^# en_GB.UTF-8 UTF-8'
    Configure locales
    Install VNC server
    Install Fluxbox
    Install xbase-clients
    Install sudo
    Allow 'developer' user to sudo anything on their VMs
    Install Madek packages
    Give madek a PostgreSQL user
    Give madek a PostgreSQL database
    Install Madek developer VM virtual host in Apache
    Activate leihs virtual host
    Install python-apt (for the Ansible apt module)
    Install lsb-release
    Install requirements for managing repos via Ansible (python-pycurl)
    zip is always something useful
    unzip is always something useful
    Add GPG key for MariaDB packages
    Add the MariaDB repository
    Install MariaDB server
    Install MariaDB client
    Install MariaDB client library (dev packages)
    Install MariaDB client library
    Make sure MySQL server is absent
    Make sure MySQL server (explicit version) is absent
    Add the Iceweasel repository
    Install Mozilla Debian GPG key package
    Install Mozilla GPG key
    Install Iceweasel
    Install Chromedriver dependencies
    Make sure no chromedriver is in /tmp
    Download chromedriver
    Unzip chromedriver
    Stick chromedriver somewhere in the PATH
    Change mode of chromedriver to be executable
    Download PhantomJS
    Stick PhantomJS somewhere in the PATH
    Change mode of PhantomJS to be executable
    Install python-apt (for the Ansible apt module)
    Install lsb-release
    Install requirements for managing repos via Ansible (python-pycurl)
    zip is always something useful
    unzip is always something useful
    Install Ruby compilation dependencies
    Install a JRE if jRuby needs to be installed
    Check if RVM is installed
    Install RVM
    Check if Ruby {{ruby_version}} is installed
    Install RVM Ruby {{ruby_version}}
    Check if Ruby {{ruby_version}} has Bundler
    Install bundler for Ruby {{ruby_version}}
    Install packages necessary for Rails hosting
    register ruby version variable
    Install passenger gem
    Check (messily) if mod_passenger has compiled
    Compile mod_passenger
    configure apache for mod_passenger (get snippet)
    configure apache for mod_passenger (copy snippet)
    Enable Passenger module
    Install gherkin
    Install Ragel parser
    Update RubyGems
    Recompile gherkin lexer