problem with pagination

Many thanks for this theme. Really nice. I was able create portfolio page, but I noticed interesting thing.
When you have more photos (f.e 3 categories, in each 8 photos), in All you have more than 1 page. When you are on page no.1, everything si ok, you can click on any category, everything works. But when you click on page 2 and than on category that has only one page, no pictures are displayed. You need click on page 1, then on category.
I noticed you don’t change parameter in url: &paged=2 when click on category.