Recently, on boot up or restart, my EOS system has been auto logging into one of the user accounts (the one I use most, call it user A) even though it is configured not to. I can log in with user B, then log out of user A, then log out of or restart from user B and get the greeter showing the users. Logging into user B requires a password, but selecting user A logs in user A without a password. Also renamed /etc/lightdm/lightdm.conf and edited io.elementary.greeter.conf as advised from a StackExchange EOS forum post, with no affect.
Any ideas on where to start looking to troubleshoot this issue?

Computer: Dell Inspiron 15-7568 laptop
OS: elementary OS 6.1 Jólni, latest updates
$: lightdm --show-config
[LightDM]
A logind-check-graphical=true
C backup-logs=false

[Seat:*]
A greeter-session=io.elementary.greeter
A user-session=pantheon
B allow-guest=false
D greeter-wrapper=/usr/lib/lightdm/lightdm-greeter-session
E guest-wrapper=/usr/lib/lightdm/lightdm-guest-session
F xserver-command=X -core
G autologin-user=

Sources:
A /usr/share/lightdm/lightdm.conf.d/40-io.elementary.greeter.conf
B /usr/share/lightdm/lightdm.conf.d/50-disable-guest.conf
C /usr/share/lightdm/lightdm.conf.d/50-disable-log-backup.conf
D /usr/share/lightdm/lightdm.conf.d/50-greeter-wrapper.conf
E /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf
F /usr/share/lightdm/lightdm.conf.d/50-xserver-command.conf
G /etc/lightdm/lightdm.conf