$ uname -a
Linux labBrix 4.19.10-300.fc29.x86_64 #1 SMP Mon Dec 17 15:34:44 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux


# dnf list kernel
Installed Packages
kernel.x86_64                                                  4.19.10-200.fc28                                                  @updates
kernel.x86_64                                                  4.19.10-300.fc29                                                  @updates
kernel.x86_64                                                  4.19.13-300.fc29                                                  @updates

The first two kernel packages are highlighted.  What is the significance of that ? 

The last package, 4.19.13-300 isn't highlighted.  It also doesn't show in the grub menu when the computer boots.  Why ?