To be sure:
you used the live ISO, to boot the normal debian-installer as you did with
the netinst ISO, then went through the whole installation as you did with the
netinst ISO, and the result is different from what you get with the netinst ISO?
So, you did NOT boot into the live environment and started the debian
installation from there? (There is a different, graphical installer, the
Calamares installer accessible from the live environment (I think the icon
is named something like 'Install Debian'), which could be different in some
regards, compared to the usual debian-installer.)