Where a party petitions for modification of a child support payment, the trial court may only increase support retroactive to the date of the petition being filed, not any time prior to that.The 1st District Appellate Court affirmed in part and vacated in part a decision by Cook County Associate Judge James L. Kaplan.In January 2012, Nanina Carraway filed a parentage action against Michael Irvin regarding I.I., their 4-year-old child. The following March, she filed a petition for support, claiming that Irvin had not been …