Command block scoreboard @p acting as @a

EDIT: actually incorrect use of command blocks, not a bug
Type "testfor @p[ score_password=64,score_password_min=64 ]" into a command block. As long as one player on the server has "password" set to 64, the command block will act like everyone has it set to 64, and output signal even if the closest player to the command block has it set to something else. Video demonstration: http://youtu.be/7XTNHYsGgmg