sudden@suddenlaptop:~$ cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu yakkety main universe
deb-src http://archive.ubuntu.com/ubuntu yakkety main universe #Added by softwar                                                                  e-properties
deb http://security.ubuntu.com/ubuntu/ yakkety-security main universe
deb http://archive.ubuntu.com/ubuntu yakkety-updates main universe

#i manually deleted the xenial lines the "Software & Updates" GUI added when i checked boxes for updates (they say for example "xenial-security" so i expected it to happen)