Yea, if you hit it to certain spots, you are just not keeping it with in 5 FT of the hole. It isn't like you can't stop it near the hole from other putting locations, but certain locations you are just screwed.
Yea, it is specifically the right elbow extending with out throwing the club out.
Yea, that specific move is just awkward.
You do not want to be making a big pump move with the arms such that the right elbow bends a ton. Its more right elbow moves up and down as the right elbow hinges like 50-60 degrees at most, and the wrist angles do not move much at all.