running F20 but still have F17, F18, F19 packages installed, why?

[Frédéric Bron]

I am running F20. I first installed F18 I guessed or F17, I do not
remember well and used fedup to update my installation.

However, when I can see that packages with .fc17 .fc18 and .fc19 in
there name are still installed (see below). Is that normal?

Frédéric

# yum list installed|grep "\(fc17\|fc18\|fc19\)"
a52dec.x86_64                      0.7.4-18.fc19                       installed
akmods.noarch                      0.5.1-3.fc19                        installed
amrnb.x86_64                       7.0.0.2-7.fc19
@rpmfusion-nonfree/19
amrwb.x86_64                       7.0.0.3-7.fc19
@rpmfusion-nonfree/19
automake14.noarch                  1.4p6-24.fc19                       installed
automake17.noarch                  1.7.9-18.fc19                       installed
bouncycastle-tsp.noarch            1.46-6.fc19                         installed
btparser.x86_64                    0.26-1.fc19                         installed
cinepaint-libs.x86_64              1.3-9.fc19
@fedora/19
dansguardian.x86_64                2.10.1.1-11.fc19                    installed
directfb.x86_64                    1.6.2-3.fc19                        installed
easymock2.noarch                   2.5.2-9.fc19                        installed
fedora-usermgmt.noarch             0.11-1409.fc19                      installed
fedora-usermgmt-core.noarch        0.11-1409.fc19                      installed
                                   0.11-1409.fc19                      installed
                                   0.11-1409.fc19                      installed
firstboot.x86_64                   19.2-1.fc19                         installed
freemind.noarch                    0.9.0-13.fc19                       installed
gstreamer-plugins-espeak.x86_64    0.4.0-2.fc19                        installed
irrXML18.x86_64                    1.8-0.12.svn3629.fc18
@updates/18
irrlicht18.x86_64                  1.8-0.12.svn3629.fc18
@updates/18
lame.x86_64                        3.99.5-2.fc19                       installed
lame-libs.x86_64                   3.99.5-2.fc19                       installed
libdca.x86_64                      0.0.5-7.fc19                        installed
libdvdcss.x86_64                   1.2.12-1.fc17.remi                  @livna/18
libgssglue.x86_64                  0.4-2.fc19                          installed
liblqr-1.x86_64                    0.4.1-5.fc19                        installed
libmad.x86_64                      0.15.1b-16.fc19                     installed
libmimic.x86_64                    1.0.4-6.fc19                        installed
libmms.x86_64                      0.6.2-3.fc19                        installed
libmpeg2.x86_64                    0.5.1-10.fc19                       installed
opencore-amr.x86_64                0.1.3-3.fc19                        installed
pdftk.x86_64                       1.44-11.fc19                        installed
python-urlgrabber.noarch           3.10-0.fc19
@updates/19
twolame-libs.x86_64                0.3.13-3.fc19                       installed
vcdimager.x86_64                   0.7.24-6.fc19                       installed
vcdimager-libs.x86_64              0.7.24-6.fc19                       installed
vo-amrwbenc.x86_64                 0.1.2-1.fc19                        installed
xorg-x11-drv-modesetting.x86_64    0.8.0-3.fc19
@updates/19