<p dir="auto">According to this waypoint's requirements, the green-box class should give the <em>top</em> of elements <em>20px</em> of margin. However, in practice it marks that value as incorrect, accepting a value of <em>40px</em> instead.</p>
<p dir="auto">In the instructions for the margin, you have the pixel setting for "Top" to 20px instead of 40px.</p>