Balk during full windup?

[frozenrope22]

RHP pitching from full windup. Base loaded. Hands together in front with both feet on rubber. Small step with left foot to side to start his motion. Right pivot foot rotates on rubber. Hands come down and separate. As left foot comes up and body rotates pitcher swings hands back up together. As he strides forward he separates hands again and pitches. All this is in one fluid motion. No stops, jerks or hitches. Is this a balk for double set because hands come together twice? NFHS rules. Umpire warned pitcher and he didn't do it anymore.