Pitcher's Signals

[Bandit]

Ok, Here's the deal. Doing a 16 & Under A State game this past week-end. I'm PU and each diamond has an official score keeper. I'm even lucky that I know the score keeper from her daughter playing ball and she has some knowledge of the rules. About the 5th inning she says that a gentleman sitting behind and to the right of the backstop is giving signals to the visitors pitcher. I told my partner to watch, and sure enough he was calling the pitch and location. Now I don't have a problem of someone else calling the pitch, lots of coaches do from the dugout and the rule book only says that the pitcher must simulate taking a signal from the rubber. The gentleman was not being loud by mouth or body language. I believe it was the pitchers, pitching instructor because I have seen him at a local indoor facility. My question: Is this considered a coach and should he be confined to the dugout? He's not "coaching" any other players?