[DaRk NiGhT]

I don't know about logging but i can tell you about how it picks who to kick.
(Keep in mind it depends a lot on how you configure the plugin...)

When the plugin senses it needs to kick someone, because the server is full or someone without reserved slot access has joined, it calls SelectKickClient. This function basically finds the player with the highest ping and kicks them.

So, what exactly is going wrong with your plugin? Who is it kicking that it shouldn't? Maybe you should also post your sourcemod.cfg so we can see how you are setting the settings.