Achievements are not unlocking.

I've implemented them but no-one appears on the dashboard under Platform Services > Achievements as having achieved any. Under Data Use Checkup I have User ID and User Profile approved, and I am running the build downloaded from AppLab (I noted someone's comment that dev builds will not count in achievements to prevent cheating). The app is not yet released.

Note, I have leaderboards working fine.

Here is my code for unlocking achievements:

public void Achievement(string _name)
{

   if (platformInitialized)
   {
      print("OCULUS ACHIEVEMENT: " + _name);

      Achievements.GetAllDefinitions().OnComplete(
         (Message<AchievementDefinitionList> msg) =>
         {
            print("OCULUS AchievementDefinitionList callback success | " + msg.Data.Count.ToString());

            foreach (var achievement in msg.Data)
            {
               print("ACHIEVEMENT | " + achievement.Name);

            }
         }
      );

      Achievements.GetProgressByName(new string[] { _name }).OnComplete(
         (Message<AchievementProgressList> msg) =>
         {
            foreach (var achievement in msg.Data)
            {
               print("ACHIEVEMENT " + _name + ": already achieved? " + achievement.IsUnlocked);

               if (achievement.Name == _name && !achievement.IsUnlocked)
               {
                  Achievements.Unlock(_name);
               }
            }
         }
      );
   }
}


The first part prints out all the achievements correctly, but the second part does not unlock the achievement.

I have the achievements set up on the dashboard, and the api names I've set definitely correspond to the ones I'm calling. 

Am I missing something obvious?  Do Achievements only unlock once the game is released?  That's the only thing I can think of.