@AuntieCatherine
Welcome to the forum!
WSUS Offline did install updates, but only the so-called scan prerequisites and apparently .NET 4.6.2. Rerun UpdateInstaller until it says "Nothing to do", and reboot the system when WSUS Offline tells you to.
The two updates that were installed in the first run (KB3177467 and KB3172605) should definitely show up in the list of Installed Updates, and in this case even in Update History (because they're MSUs).
Regards
Dalai