That's what was said above. I didn't understand it either at first because my P3A sticks both return to center. Apparently the P3S remote is like the standard RC transmitters that have the throttle stick with no return spring.
I don't quite understand about the left stick. Does the Phantom 3 Standard not have a spring loaded stick the left throttle, or in this case altitude? If this is so, then you would have to manually level the stick? This in my opinion is a dumb design. On the Advanced, and probably the Pro, letting go of both sticks initiates an automatic hover. Man, now I really feel sorry for this guy...