[KY] child support 2nd job garnishment?

So... I pay child support for my son with my full time job. Automatic garnishments. It was my understanding that getting a second, part time job wouldn't have a garnishment... Two checks into my second job, child support starts garnishing from my part time. 1/4 of the income. With the weekly payments from my part time, the payments have pretty much doubled between the two. Now, I owe arrears... Should I just let it go and get these arrears caught up or should/can I say something to the child support office?