change attribute -1

I have a strange result, when I change attribute. ( game.Vies )+1 increase 1. on a button.
But ( game.Vies )-1 on another button. increase 1 too the variable.
The game is here. Thanks
http://gamesalad.com/game/28651?GSCVersion=0.9.5&tokenUsername=titos&token=0b79ebeec494d9ef4446de070011a511d140e6370a2b5042f9a5fb5d4701d856
But ( game.Vies )-1 on another button. increase 1 too the variable.
The game is here. Thanks
http://gamesalad.com/game/28651?GSCVersion=0.9.5&tokenUsername=titos&token=0b79ebeec494d9ef4446de070011a511d140e6370a2b5042f9a5fb5d4701d856
Comments
game.vies+1
game.view-1