Great game TWD. I am also a newb to pinball so I can't tell you what is going on with your plunger or how to adjust your well walker and prison zombie underneath the playfield. I have read that others have made adjustments to the prison head and well walker in passing and it made all their frustrations with them not registering hits go away. I have yet to run across a how to with pictures or I would point you in the right direction. But I can tell you to do what I did. Pull the glass and with the game on hold the ball and roll the ball into those targets (prison doors open) and you will get a sense of how it must be hit to register. Now do the same with your finger with out a ball to register hits. Once it became apparent to me what I needed to do 'in game' to register hits all my frustration went away.

Still, it would be nice if an experienced owner of the game could story board a how to with pictures to make a calibration type adjustment for those two targets with the playfield up. It would be nice for new people with a TWD like you and I. Reading how to do it is one thing (which I haven't discovered yet) but pictures is a whole 'nother level of understanding. ...And to hope for a video... OH MY GOD!

Don't have TWD, but the plunger is a known issue with newer Sterns. Yes, an adjustment is needed there.

My Plunger is not aligned so the tip of the plunger strikes the ball squarely it hits the side of the ball, I am going to call Stern and see what they say. I have had god luck with their Tech Service.

1.) same as mine, if you look down at it you'll notice the plunger doesn't strike the ball in the center.
You have to screw the whole housing from inside the cab and move it and re-screw.
Not hard or time consuming but annoying none the less.

2.) and 3.) are switch adjustments, easy too
You're going to have to left the playfeild after you take the balls out, have you gotten that far yet?