My question involves child support in the State of: Oregon

My x wife and I have a current order through the court system for child support, parenting time and medical support (Divorce Decree). I have abided by the order fully and never been late on my child support for 6 years. Recently she contacted the Child Support Division about modifying our child support amount as she wants more money. She contacted the court system where the order was signed by a judge and found out she would have to pay to pursue modification of the current order for the child support amount. Now she is trying to have it modified through the Oregon Department of Justice as it will not cost her anything. Like I said I have never been late on my child support and have no past due amounts.

My first question is.......Can the Oregon Department of Justice supersede the current divorce/child support order that is signed off by a judge??

My other question is...if we decided to agree on an amount (in writing and have it notorized) but not change the current order through the courts is that legal or could it "bite me" down the road.??

Please help!!:confused