It would be logical that only the last bump was left after the reports, but in this particular case the moderator may have made a mistake or simply left one bump post regardless of the date. I don't see any doubt as to how things should be moderated about those who break the rule - except that those who keep repeating it are sanctioned with a temporary ban, because that's the only way for them to understand that there is a delete button and that there is a rule of 24 hours between bumps.