Lost an unlock?
I lost the 3 headed trident thing for the vanguard, it says i have 33 kills remaining, although i have already unlocked it, i even have the veteran helmet.
Try deleting the Chivalry folder in Documents\My Games. This will reset keybinds and video settings and you will have to enable the veteran helmets again through the configuration menu. Then try connecting to one of the Official Servers just to be sure.