Yes, they are a little off in the openings, but not enough to obsess over. I also attribute that partially to my adjustment technique.
Yes. I had to adjust mine. Pays to leave the lower cowl off until nightfall and then align them on your garage door.
I did crank mine inwards so they would shine at the highest level. There is still a huge difference between having them on and off at night.
The power switch is quirky also. I press the bottom edge of my powerswitch by the raised edge to turn the lights on, and the top edge of the switch button to turn them off. If I do that, I don't have any problems. If I just press in the middle, the switch won't catch sometimes.