Total time changes in Invoice Batch

User is excluding certain time entries to create an invoice for additional services of a project. After excluding these items, the total time shown here is different from what is displayed on the Invoice Batch screen, after saving the information. Why does the total time change?

The screen shows the sum of all time entries that are billable. It is possible that some of your time entries are marked as non-billable. The non-billable time is excluded from the invoices.