Account Analysis with Transaction Matching does not re-open reconciliations for non-cosmetic changes

Summary:

In our Account Analysis with Transaction Matching, the Unexplained Difference that resulted from new activity in prior periods that had previously been closed did not re-open the reconciliation to the Preparer.

Content (required):

I loaded new transactions for a prior period that had been previously closed in a daily reconciliation process. These transactions resulted in an Unexplained Difference for prior reconciliations. I thought the reconciliations would be re-opened with the Preparer, but what I actually observed is the Unexplained Difference appears for those prior periods, but the reconciliation status remains set to Closed.  

In our test system, I imported a single transaction for Oct period end, and it did not re-open prior period reconciliations between Oct 31 through current date in November that had been previously closed. Also, the Format has a requirement set to ensure the Unexplained Difference must be zero.  But, in my test cases the Unexplained Difference that resulted from the new activity did not re-open the reconciliation to the Preparer.