comparison of top and bottom salespeople

A question was brought to my attention about Objective Management Group (OMG) assessments.  For context, OMG has assessed more than 2.4 million salespeople, their accuracy is legendary and they’ve earned their stripes for predictive validity as well.  I was shown two sales candidate evaluations that at first glance had important findings that looked the same.  Both individuals lacked Desire for Success in Sales and Commitment to Achieve Sales Success.  The problem is that individual number one is their top salesperson and individual number two is their worst salesperson.  The question I was asked was, “How can that be!”