Local Ammo wont restore with new powerup. Lets take the Dabomb(since it is in the stock BZ2) If you give it to a unit and then file the dabomb thereby using your 1 local ammo.(Kill the bomb here) Then lets say that you wanted to know what happed when it blew up. So you give yourself another powerup. You local ammo will not increase. The only way to work around this is to give youself another (different special) and then give your self "da bomb" again.
In 1.2 you could just load up with another crate and boom you were on your way.