Thank you for your reply, but it did not answer my question.  All of the reconciliations from Jan thru August 2021 are correct, and in the history.  There are no discrepancies or issues with the previously completed reconciliations.  The dates, beginning and ending balances are all fine, as are the transactions (presumably because there are no reports or errors, corrections, etc...).  So, the previous reconciliations seem clean and proper.

However, when I try to reconcile the September 2021 statement, the system is pre-populating the last date of reconciliation as the last statement for December 2020.  This is despite the fact that the previous clean reconciliations for 2021 are present in the history.