aptitude makes me crazy

# aptitude --version
aptitude 0.7.4 compiled at Nov 26 2015 23:36:00
Compiler: g++ 5.2.1 20151125
Compiled against:
  apt version 5.0.0
  NCurses version 6.0
  libsigc++ version: 2.6.2
  Gtk+ support disabled.
  Qt support disabled.

Current library versions:
  NCurses version: ncurses 6.0.20151024
  cwidget version: 0.5.17
  Apt version: 5.0.0


# aptitude search '~n^udev$'
i   udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only --purge-unused markauto '!~v ~i !~E'
# aptitude search '~n^udev$'
ip  udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only unmarkauto '!~v ~i ~n^udev$'
# aptitude search '~n^udev$'
ip  udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only --without-recommends install '!~v ~i ~aremove ~n^udev$'
# aptitude search '~n^udev$'
ip  udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only --without-recommends install '!~v ~i ~apurge ~n^udev$'
# aptitude search '~n^udev$'
ip  udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only --without-recommends install '!~v ~i !~akeep ~n^udev$'
# aptitude search '~n^udev$'
ip  udev    - /dev/ and hotplug management daemon


# aptitude --schedule-only --without-recommends install '!~v ~i ~akeep ~n^udev$'
udev is already installed at the requested version (228-2)
udev is already installed at the requested version (228-2)
# aptitude search '~n^udev$'
i   udev    - /dev/ and hotplug management daemon