1. In Configuration, Pay Types, open affected pay type. 2. On the GL Distribution tab, mark the 'Combine employee distribution with this account code option. 3. Save and Close the Pay type. 4. On the employee records (all records using the pay type) expire the salary pay type as of the last period end date when it was used in a calculation. 5. Add the corrected pay type back to the employee record (it now contains the change made in Configuration). 6. Calculations will now be correct.