Questão jurídica principal
Whether already paid rent and health-insurance premiums must be deducted from maintenance contributions
Decisão extraída
The cantonal court could not refuse the deduction; the matter had to be remanded to determine the exact amounts already paid and deduct them.
Fundamentação extraída
The deduction had repeatedly been acknowledged in prior proceedings and was never disputed in principle. Refusing it would violate the prohibition of reformatio in pejus and arbitrariness; the exact payments must be established on remand.