When I see "it made me" and "onizz8zo (or something like this)" online I got to the "who's online page. It said that both of them were browsing the index of this forum but "it made me" had already reply to a topic. Does this servise has a problem?

Eh/

Oh, ok,it's oneillz8o8, sorry... Anyway, do you know something about it?

He might have multiple tabs open ^.^

No, you'll probably find its not as accurate as you think..

Still, I see all the online members looking at the main index...

Because at the time you click "who's online" they are probably looking at the main index. It happens.

I also press refresh. Are they always so fast?!?!?!?

The system logs their online status every X minutes. I'm not sure what the number is exactly. So while it may say that they were online, they might have actually logged off a few seconds later, and only after a couple of minutes will it say what they are actually doing at the moment.

Every time I go to main index and the "who's online", I see many guest searching the forum... Are they bots trying to post their advertisements?

Here is a pic: