You're not doing anything wrong, Englishtheriot. Let me ease your confusion.
We'll go over the first one. You'll have to review and match the transactions manually. This way, it'll be added to the register. You can refer to this article for more information: Categorize and match online bank transactions in QuickBooks Online.
Regarding your last concern, you're unable to find the line items in your checking account. You can only see the transaction type, payee or customer, account, and amount. You'll have to open the transaction manually so you can see the line items added to it.
I'll also include this article to help you know more about the Chart of Accounts: Learn about the chart of accounts in QuickBooks.
Feel free to let us know if you have other concerns. Don't hesitate to reach out to us again. Take care!
