I'm here to help fix your reconciliation concern, @gloriadeb204. As an insight, any changes to your previous reconciliation will affect the balance on your register. 

Since the transaction was transferred to the wrong account, yes you can delete the transfer and re-enter it as an ACH check to the previous owner. Just make sure that the Date and Amount are correct. Then, ensure to go into the check register and mark it as "R" Reconciled instead of Cleared. 

For future reference, read through this article: Fix Reconciliation Discrepancies. It helps you learn about identifying transactions that were modified. 

Should you need assistance in reconciliation, please let me know. I'd be glad to help.