PierrotLL-
When testing a Defensive formation, pressing the test button is where things are going loopy.  No offensive play is called that is where the bug is, as a defensive player gets the ball about a half second after the snap.  The test function works just fine for offensive plays.  
On a future update, I would love to see an option to choose something other than the default defense to run against.  Perhaps you could match that up from a play within the specific users playbook.