Had the DCSS attorney appeared, they would not have appeared on your behalf, i.e. to represent you. Failing to have legal representation is not grounds for an appeal. However, if you think the judge was in error by failing to make the order retroactive to the date you filed your request for the modification, I would suggest you consult with an appellate attorney. Have that attorney review your file, the documents filed in support of and opposition to your motion (if any), and the reporter's transcript from the hearing, to determine whether you have a basis for an appeal.
Unfortunately, in most cases support modification will only be retroactive to your date of filing. In order to preserve this date, you may wish to file your own motion to modify in the future, to ensure the earliest possible filing date, rather than relying on DCSS to file for you. In addition, there may be requests that you wish to make that DCSS is not willing to address on your behalf. That being said, in relation to the current order, you should ensure that the support figure is based upon accurate information, including income and timeshare, to confirm that a zero order is the most appropriate based on your current circumstances. You may also wish to review your orders, and your experience at your last hearing, with an attorney (directly, rather than on Avvo) to determine whether there are additional avenues of relief.
Best of luck to you.
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The DCSS attorney works for the benefit of the child, not the parents. As stated earlier, you may want to have an attorney review the Court order and DissoMaster calculations to ensure no mistakes were made, e.g. visitation percentage, Father's tax write offs (such as mortgage interest, property taxes, etc.) . Visitation percentage is one of the biggest factors affecting the amount that is calculated for guideline child support.
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