Is the best seller list of podcasts sensitive to the user's history or user's region on the iTunes app?

I've been listening to some podcasts on the iTunes app, and each time I finish any of them, the list of best sellers is rearranged to show the last I was listening to first the list, and all the others are pushed down in the list.

How is that possible? I mean, am I the only one listening to that particular publisher, or is that list only the user history?

Here is the link to the list best sellers I'm listening to, if you want to try it your self.