Mulitple payments to same employee print on separate checks in same payment batch

 We upgraded to R12 in April of this year.  Our outside directors are set up as employees.  Our payments to them are sometimes 1099 reportable (retainer fees, for example) and sometimes not (travel reimbursements, for example).  Under 11i, these payments rolled up to a single check when submitted as part of the same payment batch. Since upgrading to R12, these payments have printed on separate checks in the same payment batch.  We have set up separate Supplier Sites with the same address to be able to track which payments are 1099 reportable.  How can we get these payments to print on a single check and