The DOJ didn't defy the court order. The order wasn't to produce specific documents. It was to process the FOIA request and produce whatever documents the plaintiffs were allowed access to by a certain time. The DOJ's position is that under FOIA rules, they are not entitled to certain documents, while others that they are entitled to were handed over in accordance with the court ruling. The plaintiffs may contest that decision, and the court might in the future rule that the DOJ is wrong to withhold those particular documents, but the court might also rule that the DOJ is right to withhold them. But in either case, at the moment the court ruling does not specify that those particular documents must be handed over, so this isn't defying a court order.