My custom menu items are not appearing in the correct order

I am having an odd problem. I have made a custom menu with a custom post type and with a custom taxonomy with the CustomPress plugin. Most of my posts appear correctly when I make a custom menu, but for some reason some of them are not appearing correctly. The menu on the left in the submenu appears in the correct menu, but the posts are not displaying in the same order. On this site you see the items on the left and the items on the right are not displaying in the same order. I am a bit confused on this one because as I understand it, that is the reason for having a custom menu, the order.