Rotating images on header and php arguments causing errors... (Atahualpa & Shopp)

Running WP 3.1.3, Atahualpa 3.6.7, Shopp 1.1.8

Website fabric.markhamco.com

- Banner images don't rotate but do seem to load randomly. (So Atahualpa must be aware of multiple images in the directory, at least I think so.) I have the ata settings under "header image->rotate header image" = 5, sort or shuffle = shuffle, fade in and out = 0, preload=no. Any ideas?

- (UPDATE: Not Atahualpa related as I changed themes and it is still broken. BUT any help would be appreciated if you happen to see something) Also, the home page loads fine. But when you change the sort order of the products (only if you are on the home page), the result is an error "Not Found..." If you have selected a catagory, it works fine. When you go back to the home page (fabric.markhamco.com) it will load all the products in the sort order you originally requested. It seems to be a problem with passing a php argument but obviously it is doing something okay as it does change the sort order.

- Breadcrumbs acting strangely. Symptom: When you navigate to an individual product, at the bottom of the page is a breadcrumb trail. The last entry in this breadcrumb should be a clickable link to return you to whence you came. This last entry (and always the last entry and only on an individual product page) is not a clickable link. But, when I change themes, it is clickable. I'm guessing ATA changes something in the breadcrumb trail but I have no idea what or even what to look for. Any ideas?

Any help, much appreciated.