on the truth laid bear

Ok, when I first joined The Truth Laid Bear ecosystem I thought it would be kinda interesting just to see where I fit in. And then later on I was pleasantly surprised to find out I was a Large Mammal. Now recently I've been getting distinctively more traffic and comments on my site, but I'm currently a Marauding Marsupial (a demotion). What's even weirder is that yesterday and today I was actually at the very top of the Marauding Marsupial list but I had different rankings both times?!? And I actually have the same number of inbound links as the very last of the Large Mammals?!? Does anyone know how that line is drawn between Large Mammal and Marauding Marsupial?