...it's probably because they weren't properly notified.
Why would you ruin someone's life without forcing proper process-serving and making sure the person or a lawyer for them show up?
So a defendant can avoid all liability by not showing up and ignoring the court? That sounds real fair to the victim. Why would you ruin someone's life by allowing wrong doers to avoid liability by placing their fingers in their ears and chanting 'Nah-nah-nah i can't hear you" to avoid a lawsuit.
Also, let me point out thedirt.com claims it wasn't properly served, yet got the paperwork with the judgment to give to the press, which is all served in exactly the same manner. It must be magic.
The civil system in the US needs to be torn apart and started again from scratch, or merged into the criminal system like in (some?) European countries.
Your answer to this one instance of a mistake in paperwork that results in an easy to nullify judgment is to impose Napoleonic Code? Other than the Napoleonic system (which is used be France Mexico and Louisiana) the US has imported most of the spirit of European systems. And to boot you want to allow judges to make up numbers through "simple inspection", that allows judgments to be crafted on something based on nothing other than net worth. That sounds real fair to the plaintiff.
In reality, this judgment is going to be nullified once thedirt.com gets off their lazy ass and goes to court. You can't impose a penalty on the wrong party, in civil or criminal court. But that doesn't mean thedirt.com isn't going to try to milk some free advertising out of this.