My question involves expungements or pardons for the state of: Ohio

I have already filed for my expungement and paid the filing fee in Kettering, Ohio. My expungement is being opposed by the prosecutor. They sent me a letter saying that my record can not be expunged until April,12, 2011 because I paid the fines off on April 12,2009. I recieved a year of unsupervied probation starting on jan 21, 2009. Doesn't this mean I am able to get my record expunged as of jan 21, 2010. Please help I have not been in anymore legal trouble since this first and only charge.