AMY (video game)/Headscratchers

How was Lana able to open that first electronic gate, even after shutting the power off?
This Joystiq review notes that in the first puzzle of the game, Lana is confronted with an electrified gate that shocks her if she attempts to open it. The natural solution is to hack into one of the systems and shut off the power. Problem: Even though the game says the power is deactivated, the gate is still sparking when Lana returns to it, and she's still able to open it electronically, even though it shouldn't be operable without any power flowing to it. Is there a second generator somewhere in the area that the player never knows about? ~User:Willy Four Eyes