The following occurred in a game I saw last night. Shortly after the snap, the Referee flags the team on defense for Sideline Interference. They had previously been flagged for Sideline Warning. The play continues and the play results in a TD for the offensive team. The TD stands, of course, but my question concerns enforcement of the penalty. The Referee simply signaled penalty declined and it did NOT carry over onto the ensuing kickoff. Is that correct?