If an invoice has been picked up an incorrect nominal the issue could be with the invoice item (perhaps the wrong outlet was put in place on the original job) or the filters on the grid need to be updated.
For more information on how the filters on the Nominal Grid work please refer to the "Filters Overview" article.
if you are unable to find the issue please raise a case with support, ideally advising the support team which nominal code the invoice should have pulled through as this allows them to investigate the issue much faster.