Hi ctwino, and welcome to the forums
Actually, you have R and E (without Ctrl) to cycle through land stacks without orders, and T/Y to do the same for naval stacks without orders. Not sure what adidng Ctrl does; includes stacks with orders in the cycling, perhaps?
For an overview of shortcut keys. take a look at
http://www.ageod.net/aacwwiki/Shortcut_keys