I've seen this happen a few times on virtual as well as physical systems. It seems the partition end information has not been updated properly while expanding the partition. What usually solves the issue is to slightly expand the disk again (e.g. 1 GB is sufficient) and then do the resizing again. You could also try to decrease/increase the partition from within the disk management.
Many Thanks for the reply...
Unfortunately I am working on the production environment and cannot increase the hdd without any prior confirmation.