I appreciate you sharing your thoughts here in the Community forum, @Artisan3092.
Yes, the steps that you've taken are correct. You did the right thing by disconnecting the sub-accounts and only reconnecting the parent account.
Moving forward, ensure that all transactions are matched in the correct category and that duplicate transactions are excluded. This will ensure accurate accounting and prevent any discrepancies in your financial records.
For more details, you may want to visit: About bank or credit card subaccount setup.
Moreover, you can visit this article to learn how to reconcile your accounts so they always match your bank and credit card statements in QBO: Reconcile an account in QuickBooks Online.
Feel free to add a reply below if you have any further questions or concerns regarding reconciliation. Our team is always ready to assist you in any way we can. Have a great day!