SPRINGFIELD — It had been decades since attorneys from Ward, Murray, Pace & Johnson P.C. in Sterling argued a case before the Illinois Supreme Court.But last week, the firm went back-to-back in Springfield.Timothy B. Zollinger and Paul A. Osborn each argued separate cases in front of the top court Sept. 19.Osborn handled the appeal for client Frank Ochoa Jr. in In re Marriage of Louise Zamudio, a case originally …