I'm at the end of code name farralon where u have to destroy the two enemy helicopters after u do the emp charge. There's some sort of glitch where one rpg has 25/5 ammo, and none of the thirty shots can take down the helicopters, i shoot one with the zeus and hit the other with an rpg rocket, the helicopter doesn't seem to have taken any damage. But when i get a machine gun i shoot at the helicopter and it starts smoking, but never blows up. Is this some sort of glitch or am I doing the mission wrong. Could you tell me if it'll be fixed in the next patch, or tell me how to destroy them?