Gallery showing boxes

I went to add a photo to a gallery and discovered that there was a duplicate of the gallery, showing a duplicate set of images on the web page.
I deleted the duplicate gallery, but now I am left with boxes containing the image file names.
Also the thumbnail images in the current gallery are all odd dimensions, where the previous thumbs are all identical in size and layout.
Images are at
http://bingleyanglingclub.co.uk/photo-gallery/nggallery/page/3
page 4 only has boxes, but same titles as the last page 3 images.