Warning for Delay?

[egausch]

Greetings,
Had the following come up in an 8th grade game, under NFHS
rules. My team was warned for a delay of game for interfering with the ball after we made a hoop. Later, one of my defenders reached through the boundary line while the other team was inbounding. My player didn't touch the ball or player. My team was "T"'d and the other team shot two. The ref explained that the first delay of game warning counted toward the inbound violation. Even though this was different than previous games, I didn't contest the call. Later, I re-read sections of the NFHS rules and case books. My interpretation is that each "Warning for Delay" is recorded for the specific violation and not combined. The NFHS case book just about states this directly.
Which is right?
Thanks
EG