Who -r interpret?

I booted into single user mode with

/usr/sbin/reboot -- -s

but after doing a control -d

my

who -r 

shows

 run-level 3  Nov 17 14:07     3      0  S

I was expecting it to show run-level S
why is this still in run level 3?

thanks

The "S" at the end is the previous run-level - that in effect before you switched to run-level 3.