Hi all,
someone can explain me this output:

System-A
who -b cmd: belowe the output

system boot 2022-09-26 20:51

uptime -s cmd: belowe the output different from who -b command

2022-09-26 18:51:32

Just uptime output

11:47:31 up 16 days, 16:55, 7 users, load average: 1.09, 0.82, 0.78

System-B
who -b cmd: belowe the output

system boot 2022-09-26 20:51

uptime -s cmd: belowe the output different from who -b command

2022-09-26 18:51:30

Just uptime output

11:47:31 up 16 days, 16:56, 5 users, load average: 0.07, 0.09, 0.13

System-C
who -b cmd: belowe the output

system boot 2022-09-26 20:51

uptime -s cmd: belowe the output different from who -b command

2022-09-26 18:51:07

Just uptime output

11:47:32 up 16 days, 16:56, 5 users, load average: 0.11, 0.15, 0.20

Thanks in advance
bye