yes, the motor will park the wipers (Almost at the same place) all the time but depending if the windshield is dry or wet or if you're driving at speed, it might vary. Yes, you can remove the bolt on the wiper arm and move it by one notch but it could too much...and it will change the sweeping.
On mine (One piece windshield, I found that one notch was too much and I was mad at looking at it! What I did is look behind the fiberglass front end where the motor and the arm are bolted and I found that you can loosen the control arm (Two nuts) between the motor and the wipers and rotate it to adjust it perfectly.
Now on mine, the wiper are perfectly level and it makes for a nicer looking MH.
BTW, did you notice that even on the factory pictures, the wipers are almost always crooked