Thanks for reaching out to the Community, @ckfoodbank.
QuickBooks Desktop (QBDT) remembers the last calendar date entered on a reconciliation. So if a future date was entered, the Reconcile window and the reconciliation reports will default to that future date until it has passed.
To fix this, you will need to undo the last reconciliation to reset the last reconciled date and remove the Previous Reconciliation report for the corresponding date.
Here's how to do it:
For more insights about the reconciliation process, I suggest checking out this article: Reconcile an account in QuickBooks Desktop.
You may visit this article that tackles the common issues you may encounter while running the Previous Reconciliation report along and the ways on how to fix them: Resolve common issues on Previous Reconciliation report.
Reach out to me in the comment below if you have any other questions, and I'll get back to you as soon as possible. I'm always here to help. Have an amazing rest of the day!