I am not sure exactly what Mark means when he says "it does need to expand..."
The normalize columns/$firstPageImages bit is to make the page where both images and albums are displayed contain the "right" number of images. Without this code, a new page will be started for the images, so you will get a page with the remaining subalbums on it, then a following page with the first of your images on it.
As Mark said, though, if you don't want this feature, you can modify the theme. You can just change line 4 to `$firstPageImages = 0;` to do the disabling.