Welcome to the QuickBooks Community, LisaC1.
I'd be delighted to help you fix your reconciliation and get rid of the transactions that need to be deleted.
You can undo your last month's reconciliation and completely delete those transactions. To undo a reconciliation, you'll need to manually edit the reconciled transactions one at a time, and use your reconciliation report or bank statement to verify which transactions you need to edit.
Here's a helpful article that outlines the step by step process: https://community.intuit.com/articles/1145256.
After following these steps, I'm confident that moving forward you'll be able to accurately reconcile your bank statement.
You may also refer to this article just in case you need to fix some reconciliation discrepancies in the future: https://community.intuit.com/articles/1502119.
Feel free to contact me if you need anything else by posting in the Community. I'm always here to help. Have a great day!