In Xero, go to Reports - All Reports - Bank Reconciliation Summary
Enter date as the last day of last month
Will take you to this page.
PLUS OUTSTANDING PAYMENTS and LESS OUTSTANDING RECEIPTS means they were reconciled/paid not in the same month as the invoice entered date.
We now have to edit and correct the dates.
Open one entry:
As shown above, the invoice was entered 27/10 but was only reconciled 04/11 which means that was when the debit/deposit appeared in Xero. We now have to match the invoice/payment date to the date of debit/deposit.
To do so, click on the invoice number. It will take you to the invoice entry. Click on Payment.
Click on Remove and Redo

Make another payment this time, using the date that the transaction appeared in Xero.
Then go back to Xero dashboard to reconcile
After reconciling, refresh the Bank Reconciliation Summary page and it should be gone, meaning it's reconciled to the correct date.
Do this for each account til it's cleared, leaving the unreconciled cheques that arent more than 2mos old which is only going to be sorted even if under 2mos when we are doing quarterly BAS.