uname montre la version du noyau non installé

Voici la liste des versions du noyau installées sur mon système :

bwvdnbro@wixie:~$ dpkg -l | grep linux-image
ii  linux-image-3.13.0-73-generic                         3.13.0-73.116                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-74-generic                         3.13.0-74.118                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-76-generic                         3.13.0-76.120                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-77-generic                         3.13.0-77.121                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-79-generic                         3.13.0-79.123                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-83-generic                         3.13.0-83.127                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-85-generic                         3.13.0-85.129                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-86-generic                         3.13.0-86.131                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-87-generic                         3.13.0-87.133                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-88-generic                         3.13.0-88.135                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-91-generic                         3.13.0-91.138                                       amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-73-generic                   3.13.0-73.116                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-74-generic                   3.13.0-74.118                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-76-generic                   3.13.0-76.120                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-77-generic                   3.13.0-77.121                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-79-generic                   3.13.0-79.123                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-83-generic                   3.13.0-83.127                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-85-generic                   3.13.0-85.129                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-86-generic                   3.13.0-86.131                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-87-generic                   3.13.0-87.133                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-88-generic                   3.13.0-88.135                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-91-generic                   3.13.0-91.138                                       amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-generic                                   3.13.0.91.97                                        amd64        Generic Linux kernel image

Cependant, la sortie de uname est

bwvdnbro@wixie:~$ uname -a
Linux wixie 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Pour autant que je sache, ce noyau n'est pas installé. Comment cela est-il possible ? Je viens de redémarrer mon ordinateur, donc le noyau en cours d'exécution devrait être celui qui a été installé en dernier.