The Professional Referee Organization got it right, but now they're getting it wrong.
There has been a significant amount of chatter about the Tranquillo Barnetta free kick, especially with the report from the Professional Referee Organization (PRO) that says the goal should not have counted. That PRO is acknowledging their shortcomings is a good step, however in this instance they don't need to apologize for getting the call right.
There are two points of contention with the legality of the goal - whether the Philadelphia Union's wall was offsides when Barnetta struck the ball and whether Orlando City SC's Joe Bendik was obstructed from viewing the shot.