photos moved down on grid, how to align?

Hello,

can anyone help me please with the alignment of photos problem. My photos are moved downand do not fill the grid border.
Check here:
http://dariuszczepiel.pl/portfolio/historie/

did anyone have the same problem and resolved?
I tried the ampersand replacement and float:left addition to style.css file but it does not help.

I’d appreciate your input.

http://wordpress.org/extend/plugins/category-grid-view-gallery/