Visitor Stats don't match

[RFViet]

Hello,
Anyone understands the stats in this pic ?
It said 8388 users online but the total guest visited forum today only 3,578 ?
Is there something wrong ?

[squidsk]

Whatever mod that is calculates the number of guests to the site differently than the default vbulletin method.

[ozzy47]

I don't think so, what it may be is alot of them may be spiders.

[RFViet]

Do you think this could relate to cron job set up ?

[ozzy47]

Like I said I think it is due to the spiders. If Google hits your site with 100 spiders, using different ip's IIRC that is still considered as 1 visitor, and so on with all the other spiders.