Completion of Grenade Quest

[Rob]

Ok, so I completed the grenade quest and was given the grenade pouch. The combat skill, Throw, was unlocked, but the ammo skill, Explosive, was not. Hovering the mouse over Explosive says it should be unlocked at level 0. Obviously, this means I cannot use grenades as the starting ammo skill was not unlocked as it should have been.

Anyone else having this problem? Maybe I am not doing something correctly?