Missing some records in the 404 error log

Hi,

I have Slimstat Analytics installed to see all my incoming traffic. I saw a fetch of folder “/admin”, that doesn’t exist of course. So it ends in a 404.

In the 404 log of this plugin, however, I do not see this failed 404 request being logged.

It is worthwhile to note that I also have a country redirect in place, that has redirected the user to another valid page.

It is difficult to tell which plugin jumps in first to log this 404 error: Slimstat analytics, country redirect (IP2Location Redirection), IP direct?

My question: are ALL 404 errors logged by this plugin, before a visitor gets redirected?

Thanks,

Didier.