At first blush it sounds like it is working as it should, but it has been 5 days. Quite some time for all packages to stay up to date.
root@kali:~# apt update
Hit:1 http://mirrors.ocf.berkeley.edu/kali kali-rolling InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
root@kali:~#
/etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux 2018.2 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 20180412-12:50]/ kali-last-snapshot contrib main non-free
# deb cdrom:[Debian GNU/Linux 2018.2 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 20180412-12:50]/ kali-last-snapshot contrib main non-free
deb http://http.kali.org/kali/ kali-rolling main non-free contrib
# deb-src http://http.kali.org/kali/ kali-rolling main non-free contrib
# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
I suppose that if this were an issue with the repository, I'd've thought I'd find something in my google searches, checking other linux forums
