How does stepping to a wave work? Can people actually step to right hands and then do a left spin the top?
Yes they can, if only the centers stepped. What happens when some, but not all, people step to right (or left) hands can be confusing. Here is how it works: Whenever anyone steps to a (mini) wave, they always take right hands unless the caller said “left”, in which case they take left hands. This is true even if the result (because of other people who didn’t need to step) is a wave of the other handedness. The call then proceeds in whatever handedness the resultant wave has, except that, if the caller said left, the resultant setup must be a left-handed wave.