Working Capital in Qu 1 F9

When working capital is used in Qu 1 it usually is recovered in full in the last year unless the qu specifically states to ‘ignore working capital recovery’.
Dec 10 – Specifically states to ignore working capital recovery
Jun 11 & Dec 11 – Have working capital in the qu and it doesnt say to do anything with the working capital therefore it is automatically recovered in the final year
Jun 13 – Is the exact same as Jun 11 & Dec 11 but yet the examiner does not add back the working capital whereas if you were basing it on Jun & Dec 11 it should have been added back.

Can someone please help me as the difference in adding this back or not is the difference in whether it is a poisitive NPV or not.

Thanks
Ciara