I'm attempting to use the "Level All" button in MS Project 2013 Professional.  There are three resources, which you can see in the screenshot, with two of the resources working on the same item, shown in gray.  Since both resources are assigned to the same task, why on earth would MS Project leave a gap for one of these resources, effectively keeping him idle, while the task assigned to him is not yet complete?  Thanks!

![enter image description here][1]

  [1]: http://i.stack.imgur.com/pd23u.png