[Plugin: NextGEN Gallery] image gallery layout

Hi,

I am wondering if you could help with the following problem.

The link : http://www.am-originals.com/gallery/acrylic-paintings/
shows that the layout of my NextGEN gallery has gone a bit wonky- the bottom 4 images should be on the next row up. I have no idea why this has happened, when I first set up the gallery page it was fine, so I have obviously inadvertantly done something wrong!

Any help on this would be greatly appreciated,

Alison McAleer

http://wordpress.org/extend/plugins/nextgen-gallery/