Oh that's an odd one...haven't seen that in any of many times we've been to court for our kids. It would mean that whatever petition or motion that was brought before the court was denied I think.
I guess it would depend on what the specific action before the court was...if there was a motion being heard, do you know what it was? The case was your state's child support enforcement division taking him to court on your behalf for contempt for not paying, right? Not him requesting a hearing or something?
Whatever the case, you should be able to go to the clerk's office at the courthouse and get a copy of whatever happened in court. If they denied a request to hold him in contempt for not paying, that would be pretty disappointing.
FWIW, Florida's child support enforcement has a reputation for being grossly ineffective that spreads far and wide. My oldest son's father moved to FL because of its abysmal reputation for child support enforcement. He hasn't paid me anything in 14 years and they still won't do anything effective because the case is out of state. I hope you get some answers and some action.