Comment on June 2017 CU for SharePoint 2013 product family is available for download by Stefan Goßner

Hi Charls,
the database schema version is not a build number. And the database schema is not changed with every CU or every build.
You cannot expect that the database schema version is identical to the highest build number of SharePoint.
See here for details:
https://blogs.technet.microsoft.com/stefan_gossner/2016/08/23/sharepoint-does-not-have-a-build-version-full-stop/
Cheers,
Stefan