i had a childsupport case where i had arrears in a county that i was paying on. then i recieved custody of my son and had custody

of my son for 4 and half moths during that time she never called the courts to cancel the child support and i had to go to court to get it terminated. after it was terminated i went to a different county where i lived and filed fo childsupport, they gave me childsupport and i asked to have it applied to my arrears, in the mean time i went to court and a judge vacated the 4 months of child support in arrears that i owed. but recently i started a new job and my paycheck was attached and i noticed that they had me set up for arrears the child support i owed was vacated in in feb, 2012 i started paying childsupport in march now they just told me i was 1906 in arrears when all that was vacated is that legal. the county is lehigh county pensylvania. if you have a free consultation to discuss this i would like to hear your views and also if possible file a civil lawsuite if i have a case.