I'm building natureofsand.nl and I use the cpoc plugin to sort the posts.
When sorting the post-order in category 5, everything works immediately:
When sorting in category 6, however, it breaks. As soon as I check the box
"Use Ordering for selected Category:",
the page http://natureofsand.nl/?cat=6 displays
"Apologies, but no entries were found."
Any thoughts on this one?