[SLL] Quick question about "who"

[Mike Stunes]

Is there some reason why the number of users reported by "uptime" and 
the number reported by "who" would be different?

stunes at homebox:pts/0 ~ % uptime
 01:20:34 up 9 days,  2:13,  2 users,  load average: 0.08, 0.11, 0.12
stunes at homebox:pts/0 ~ % who
stunes   :0           2008-08-27 01:08
stunes at homebox:pts/0 ~ %

Logging again at a console made uptime show 3 users, and who listed 2. 
Anyone know what's going on?

Thanks!
Mike