In order for the cancellation to show for the correct invoice period, you'll need to unaccept the last two periods and regenerate.
Unaccept an invoice
To unaccept an invoice, follow these simple steps.
Click Finance, then click Invoice.
Click Management.
Locate the periods you need to unaccept and click unaccept on the relevant period.
Generate an invoice
Once you have unaccepted an invoice you'll then need to regenerate and accept the invoice. To do this follow these steps.
Click Finance.
Point to Invoice, then click Management.
On the Invoice Run list, select your run.
Under Generation Status, click Generate?
Accept an invoice
After you've generated and checked your invoices, you can accept it by clicking Accept? to the right of the invoices.