Subject to paragraphs (2) and (3), all payments made by the trustee under this section shall be disbursed according to the order of priority in section 726. (2) Administrative expenses and fees Before or at the time of each payment to a creditor under a repayment plan, the trustee shall pay any unpaid claim of a kind specified in section 507(a)(2). (3) Exceptions In disbursing payments under this section, the trustee shall, at the time of each disbursement, pay— (A) any unpaid claim of the kind described in section 507(a)(2)