The latest version has been installed, and the same issue is still occurring with the page that I was working on. I've also just noticed that it will also let you page negatively (as in it displays "First Prev -19--10 of 8 Next Last.") if you click "Last" and the "Prev."
As a test, I created a new page and placed the module on it, and the paging error isn't occurring on that page. Not sure what's going on here, or what other information you may need to fix it.