Hi Rudi719,
Good day ! i'm here
to help :)
I understand your concern as the report does not gel to each other. Please not to worry, you can choose the "balance forward" under the statement type and this will resolved the issue.
This is because the "open Item" will only list the open item only. The system are not able to detect the credit it for which open item, thus it is excluded in the report.
Thanks.