Since the phrase "after cheerleader" is a prepostional phrase, the simple sentence should be "Cheerleader was practicing her move." and NOT "Cheerleader were practicing their moves."
Two things- Does each cheerleader only have one move? The way you stated your first sentece made it seem that way. Also, I believe the word you're trying to use is "practicing" NOT "practing"
I know that people want to work out the logic and the grammar, but as a matter of actual practice, rather than tying yourself in knots over this, you can simply rewrite it.
One after the other, the cheerleaders praticed their moves. Or, One after the other, the cheerleaders practiced the move [that was causing them such difficulties].