On turn 8 of game 672299 ( http://www.youplay.it/play/bm_GameMove.asp?GameID=672299 )
So, there is at least one bug here, but it might be either (or both) of these two options:

1. It should only be possible to draw one copy of the "1 gun destroyed" chit for damage due to shooting in a given turn, since there's only one of them in the set and all the chits for damage received by a given fighter on a given turn get are drawn at once. The rules say specifically: "The player should not return any chits to the cup until after all his chits have been drawn."