You shouldn't have an issue getting the N-600. You're having to do this since your mom never registered your birth with US officials at the time..I'm sure this happens to many without realizing it until they are faced with having to prove US citizenship later in life.
As for USCIS telling you that you shouldn't be working and have voted, they are answering strictly from their inability to confirm your status rather on the fact that you already are a US citizen. That's like the DMV telling you that you shouldn't own a car since you lost your driver's license and they can't verify your status since their computers are down.
As for USCIS telling you that you shouldn't be working and have voted, they are answering strictly from their inability to confirm your status rather on the fact that you already are a US citizen. That's like the DMV telling you that you shouldn't own a car since you lost your driver's license and they can't verify your status since their computers are down.