Beats and steps are not the same thing
When you learn basic steps in Swing, two things happen at the same time: the music provides the pulse, and your feet distribute movements across it. Four beats can carry four weight changes, but they can also include extra steps in between or a held moment. So the length of a figure does not tell you how many times you actually step.
A Triple Step contains three weight changes over two counts, spoken roughly as “one and two.” In the context of Swing, the “and” is not automatically a mathematically equal half. The exact placement depends on the music, tempo and technique. A Rock Step, by contrast, has two weight changes: you shift your weight onto one foot and return it to the other. “Rock” does not mean leaning far back.
Your knees stay flexible, and your weight settles over the supporting foot. Rhythmic body movement supports the pulse without requiring you to mark every beat with a jump. Big gestures in dance scenes in film and television often show a performance, not the economical movement of a basic pattern. The visual effect alone does not explain how the weight is placed on the feet.

