Follow the below steps to check the differences match:
Select Advanced Report Execution.
Click on the Accounts Standard/Bank Reconciliation/ Retrospective reports folders.
Choose either Date Based or Period Based folder.
Run the Trans Date > State Date report.
This report should match the difference on your Retro Statement, if it does not match then follow the same steps as above but select the Adjustments report.
If neither of these report totals match the difference on the Retro Statement then please raise a new case online and reference the title of this article.