Pagenation issue

Experiencing issue with pagenavi.

The last page of each of the pagenavi is doubeling the posts. It is displaying the last page twice, if you look at the page below you will see by clicking the next link or page two. We do have page navi installed but the normal wordpress links do the same.

http://mudwallow.com/category/restaurants-and-shopping/restaurants/

This is happening on other sites as well Multi user as well as Single. We have tried it with a custom permalink structure as well as with none.

We are running

* WordPress 2.8.1

* Page-Navi 2.50

* Traveler 1.5