Generally, support magistrates have wide discretion. It isn't clear why the judge changed the payment date but perhaps there was a valid reason presented.
If you are paying through the support collections unit, generally you won't get a refund but you should get a credit. You might go to the scu in your area. I find they are more responsive if you go in person than if you try to call.
Good luck!
Answered on Feb 21st, 2013 at 3:17 PM