It may be that following posting reversals, you need to perform a Nominal Rebuild. To Do this please follow the steps below:
From the DPS FD home screen, go to Tools.
Select Rebuild Nominal Balances.
Select Rebuild Last Year Retained Profit (This might not be needed, but it does not harm ticking this option).
Click Rebuild Balances.
Refresh your bank nominal, and you may find this corrects the imbalance.
If the imbalance remains, please raise a new case online and reference the title of this article.