This can occur when at least one employee in the batch had a payment voided and a calculation deleted. To set the batch back to a calculated status:

1. In Payroll processing > Enter Time worked > locate the batch appearing as partially calculated
2. Open the batch
3. Locate the row which no longer shows as calculated
4. Right click on the row and select to Delete the row
5. Repeat for any others in the batch
6. Save and close the batch
7. Repeat for any other partially calculated batches