Comment # 6 on bug 1204658 from Stefan Hundhammer

When you install multiple versions of the same package (here: kernel) at the
same time, this gets even more complicated, of course.

And no, there is not and will not be yet another filter like "show me only the
retracted versions of the multi-version packages that I have installed"; this
description alone shows that it would just confuse every normal user.

Users who do use this multi-version intallation option are expected to be a lot
more advanced and have more background knowledge about what is going on here.
So yes, that package may appear when you apply the "retracted installed" filter
because indeed you do have a kernel installed, and there may be a version of
that kernel that is retracted; and yet you may not have that particular version
installed. In that case, the filter may show more than you might expect.

But this is why there is - on top of having the filter in the first place - the
red text color for the retracted version(s), and (we even cater for color-blind
users) additionally the note "[RETRACTED]" for them.

I think we already maxed out the luxury options for this very rare doomsday
scenario. ;-)