i have had this happen, but this only happens in the docks. the archives when u get a hero sometimes you "cant fire" it for some reason puts the fire rate to one bullet.
as for the docks, i have had the double hero glitch and had the same thing as you, but i have had it happen once where i was hero and i threw out my 3 mines and someone on the other team walks into it and blows em up. it then gave me one more proxie to throw. and it kept doing that the whole time. i got my longest streak on that game.
there are a lot of problems with this game, and the more hackers there are, more and more seem to happen, and a lot more frequently, especially with wii freezes.
i believe that the hackers input so much information, that the processor cant handle it and overheats and freezes.
i got to this assessment by playing so much. i have played 3 hours straight with no problems. then some 56er comes in and freezes. i shut off and turn on and then play a couple games fine, some hacker comes in and freezes again.
i believe they overload the program with their massive data they have to use for their hacks.