Commitment Accounting deduction mapping for split earnings

Hi,

We are implementing Commitment Accounting and have a question regarding deduction mapping. We have hourly employees (instructors) whose earnings are charged on two different GL accounts, depending on the type of assignment (instructional and non-instructional) they perform. Employer-paid retirement benefit deductions are charged to respective GL accounts. They have two different Job records in the same pay group (mainly because the rates are different), and they are tied to one benefit record. To map the deductions to appropriate GL accounts with Commitment Accounting, we would need to put them in two different retirement plans. However, we do not want to