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PAY: How to create a separate journal entry for reversal of Partial Period Accrual Calculation
[Run] ... the Transfer to GL process again when the actual costs become available at the end of the current payroll period. This cancels your estimates and replaces them with the actual costs.
I expect the actual costs become available after we've run costing for the current payroll period. At that point we find Transfer to SLA creates a journal entry that contains both the accrual reversal ("cancels your estimates" above) and the costing for the current pay run. We'd like to keep these separate for ease of troubleshooting and reconciliation.