Software Updater Installs Unselected Packages

[Vindicator]

There were a whole bunch of updates available after a fresh install.
I selected ONLY Ubuntu base and ecryptfs, however while watching the detailed progress output, I saw other packages downloading and unpacking like facebook plugin and libreoffice related packages even though I KNOW I deselected them.

Perhaps the deselected items HAD to be installed because of other selected updates such as something in Ubuntu-base changed so an unselected item needed to upgrade as well due to a dependent incompatibility.
If that were the case, I would expect a notification.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: update-manager 1:15.04.7
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun May 31 15:34:45 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'852'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'484'
 b'com.ubuntu.update-manager' b'launch-time' b'1433104366'
InstallationDate: Installed on 2015-05-31 (0 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
InterpreterPath: /usr/bin/python3.4
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.