*SPOILER* First one is a minor bug, yeah. The second one in the power-room I'll fix right up, but the intended way or order of operation is as follows: trigger the switches and the security switch on the right, then if you have the screwdriver, interact with the fuse-box that is screwed shut. It might have reset the switches when you left to explore other rooms, so make sure to trigger them once more once you have the screwdriver. After that it will ask you to turn the switches off, do so, and if you did, try clicking on the fusebox once more.
I'm sorry for the inconvenience, but I hope it has been fun so far and thank you for playing.