Have you tried using mouse wheel to scroll through them?
No I have not, I have been playing with a Gamepad, Maybe that is the issue then I will give it a try.
*EDIT* Using the scroll wheel does replenish them to 9, so I guess i can just spin the wheel every now and then when i need throwables, thanks 0x90
[Edited by Testify, 11/16/2014 3:12:51 PM]