The judge doesn't "Have to " inform, they "May" inform... 

One of the maneuvers should have been zeroed.  They either did an additional 360deg at the end or at the beginning of a maneuver.  Personally I would have likely zeroed the maneuver they just finished as I've seen on two occasions where the pilot THOUGHT they had left the maneuver incorrectly (upside down or right side up), started to do a half roll to fix it only to realize they were correct and had to complete the roll to get back on track.  Sadly, in the instance I'm referring to, the other judge was using that "between maneuver" moment to write the score down and never even saw the half roll "CRAP! Can't believe I did that" another half roll moment.    We really do need to get back to using scribes whenever possible.