Description of problem:
Whenever I update some packages using gnome-software, for the next update, I again see the same packages mentioned in gnome-software as available updates (+ some new real updates).

In the video attached, I updated telnet and tmux. For the next update, only opus is available as an update, but gnome-software shows telnet+tmux+opus.

I can reproduce this consistently every time. Also, I checked using `pkcon get-updates`, and this is only displayed incorrectly in gnome-software - pkcon shows only the real set of available updates.

As far I as I say, this only seems to be a graphical glitch and doesn't prevent performing updates. But it could explain some weird glitches people saw regarding the available update set.

Version-Release number of selected component (if applicable):
appstream-data-29-7.fc29.noarch
gnome-software-3.30.5-1.fc29.x86_64
libappstream-glib-0.7.14-2.fc29.x86_64
PackageKit-1.1.11-1.fc29.x86_64
PackageKit-command-not-found-1.1.11-1.fc29.x86_64
PackageKit-glib-1.1.11-1.fc29.x86_64
PackageKit-gstreamer-plugin-1.1.11-1.fc29.x86_64
PackageKit-gtk3-module-1.1.11-1.fc29.x86_64


How reproducible:
always

Steps to Reproduce:
1. make your system fully updated
2. downgrade package X
3. update package X via gnome-software
4. downgrade package Y
5. see that gnome-software shows available updates for X and Y