A new installation needed no updates. I installed Ubuntu 16.04.2 desktop amd64 near midnight on Aug. 16-17, 2017, and opted against updating during the installation (I wanted to test one issue before updating). So either Ubuntu 16.04.2 had never been updated when I installed it to the HDD on the above date, in which case this bug report is invalid and can be closed, or it auto-updated during installation, in which case it ignored the option against auto-updating during installation and therefore this is properly a bug. I don't know how to check which is the case but I hope someone knows how to find out if a Ubuntu server was storing updates for new installations.
I have cold-rebooted multiple times before reporting this, so I don't have the logs you prefer. Also, a search does not produce System or lsb_release -rd and a CLI terminal tells me that lsb is not a command on my system.
Correcting my error: I revisited the CLI terminal. For lsb_release, it says that no LSB modules are available.