members directory: recent post does not appears and members per page

I just installed the plugin members directory which I like a lot. It is just beautiful and really helpful.

I just wonder on two things:

1. Why the recent post doesn't appears in my web (according to the description there should be one). Here is the link to the web:

2. Also whether it is possible to change the number of the members shown in each page? the current one is 10, how can I change to 20 or 15?

Any advice will be very much appreciated.