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I will try to best answer your question.
From your description of events, it sounds like the Judge held you to the same earnings you had from the job in NY. Unless the job in New York laid you off the Judge there would have had little choice. You could file to appeal that order if you are within 30 days of the date of the decission. Otherwise you could file another modification after you have had a change of circumstances. A change of circumstances could be based on many different things, for example another child being born, a move, another job change, a lay off, illness, etc.
I hope that this information is helpful. I wish you the best of luck.