Can multiple rebates be applied under one adjustment schedule?

I need to apply two different rebates under the same adj schedule for the same group or items and customers.  The accrual account for each is different, but I only seem to get one rebate applied to the sales order line, the second one.  I found a way to do it using the master schedule and different adjustment schedules, but it seems like it will be an ongoing maintenance nightmare to figure out where the rebates are actually set up. 

Any suggestions based on the adjustment definitiion set up would be appreciated.