aptitude тащит один и тот же файл дважды

> cat /etc/apt/sources.list{,.d/*}
deb http://mirror.yandex.ru/debian jessie main contrib non-free
deb-src http://mirror.yandex.ru/debian jessie main contrib non-free
deb http://mirror.yandex.ru/debian unstable main contrib non-free
deb-src http://mirror.yandex.ru/debian unstable main contrib non-free
deb http://mirror.yandex.ru/debian experimental main contrib non-free
deb-src http://mirror.yandex.ru/debian experimental main contrib non-free
deb http://repository.violetsky.ch/steam/ wheezy main
deb-src http://repository.violetsky.ch/steam/ wheezy main

> cat /etc/apt/preferences.d/*
Package: *
Pin: release a=unstable
Pin-Priority: -100

Package: *
Pin: release a=experimental
Pin-Priority: -100

Package: iceweasel
Pin: release o=Debian
Pin-Priority: 600

Package: xulrunner*
Pin: release o=Debian
Pin-Priority: 600

Package: libmozjs*d
Pin: release o=Debian
Pin-Priority: 600

> cat /etc/apt/apt.conf.d/*
APT
{
  NeverAutoRemove
  {
        "^firmware-linux.*";
        "^linux-firmware$";
        "^kfreebsd-image.*";
        "^gnumach$";
        "^gnumach-image.*";
  };

  Never-MarkAuto-Sections
  {
        "metapackages";
        "restricted/metapackages";
        "universe/metapackages";
        "multiverse/metapackages";
        "oldlibs";
        "restricted/oldlibs";
        "universe/oldlibs";
        "multiverse/oldlibs";
  };
};
// File autogenerated by /etc/kernel/postinst.d/apt-auto-removal, do not edit
APT
{
  NeverAutoRemove
  {
    "^linux-image-3.11-2-amd64$";
    "^linux-image-extra-3.11-2-amd64$";
    "^linux-signed-image-3.11-2-amd64$";
    "^linux-backports-modules-.*-3.11-2-amd64$";
    "^linux-headers-3.11-2-amd64$";
    "^linux-image-3.12-1-amd64$";
    "^linux-image-extra-3.12-1-amd64$";
    "^linux-signed-image-3.12-1-amd64$";
    "^linux-backports-modules-.*-3.12-1-amd64$";
    "^linux-headers-3.12-1-amd64$";
  };
};
// File installed by postgresql-common. Currently not updated automatically,
// but might be in future releases.
//
// We mark all PostgreSQL packages as NeverAutoRemove because otherwise apt
// would remove the old postgresql-x.y package when the "postgresql" meta
// package changes its dependencies to a new version, rendering the old
// database cluster inaccessible. As access to the cluster might depend on
// other modules (like datatypes), we use a pretty wide pattern here. We might
// tighten this to match only actually used PostgreSQL versions in the future.

APT
{
  NeverAutoRemove
  {
    "^postgresql-";
  };
};
// Pre-configure all packages with debconf before they are installed.
// If you don't like it, comment it out.
DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt || true";};

cat /etc/apt/apt.conf.d/98pdiff
Acquire::PDiffs "true";
Acquire::PDiffs::FileLimit "2";

apt-config dump|grep PD