Hi Geoffrey, did you set up a champion/challenger test on a batch campaign or on a triggered campaign? If you set the champion/challenger test on a triggered campaign, then you should be able to see results by going to the A/B test dashboard. If you ran a batch campaign, then you're probably seeing results that look like only one of the emails sent, which is exactly what happened. Unfortunately, champion/challenger doesn't work on batch campaigns -- only triggered campaigns.
If you set this up under a single-send email program, then you should be able to change the view to "Dashboard", and see the results.