If the divorce decree modified the TPO, those terms control. First -- keep a copy of the relevant court order everywhere you might need it -- your car, etc.
If you have been cited for violation of the TPO, appear at the time and place indicated -- WITH a copy of the controlling order -- and so inform the court. You might be able to save that appearance by going to the City Attorney (presumably -- you do not say what jurisdiction) ahead of time, by appointment, and explaining the situation.
And if the TPO is being misused, you can file an application to dissolve it in the TPO court, to prevent further recurrence, instead turning any orders into behavioral orders issued by the divorce court, which the judge can enforce if violated. See http://www.willicklawgroup.com/domestic_violence.
You should probably seek consultation with an appropriate family law specialist. I would suggest starting your search with the American Academy of Matrimonial Lawyers, the Nevada chapter of which can be viewed at http://www.aaml.org/go/fellows/fellows-by-state/?showResults=true&state=NV.
If you decide you would like to discuss this with one of the attorneys of this firm, please take a look at our consultation policies, procedures, and costs, at http://www.willicklawgroup.com/consultation_policies.