Variation 4 is weird. Having them receive the ball with the inside of the leading foot is not only against what we typically teach our kids (instead we instruct them to receive the ball “across the body”), but in this exercise specifically makes the receiver very awkward and bio mechanically hard to handle.
What I observed is, they r following as the instructions were given. Perfect. No use of outside foot. Basic techniques. Here when I ask to use inside, they use outside.