I've got some ideas about your banking concern, @HughMalik.

First, re-importing the file for your checking account should bring the transactions back. Since you're unable to see them, I recommend getting in touch with one of our representatives. They can take a closer look at your account through a screen-sharing and provide other fixes.

Before diving in, please review our support hours guide to ensure they can assist you right away. Also, please note that we've made some changes to our support options for QuickBooks Desktop. Our representatives are available through chat or messaging to accommodate all our customers' concerns effectively. 

Here's how to reach them:

1. Open QuickBooks, and then click the Help menu.
2. Select QuickBooks Desktop Help.
3. On the pop-up screen, choose Contact us.
   
4. Enter your concern on the Tell us more about your question box, like "missing banking entries."
5. Click the Search button, and then select the Start a Message button.
   
   
6. Fill out the needed info, and then click Submit.

In the meantime, you can manually enter those missing transactions in QuickBooks.

After fixing the said issue, you can begin adding and matching your entries. This helps ensure they're accounted for correctly and prevent duplicates.

Then, you can do your usual reconciliation to keep your books are accurate.

I can always provide more banking insights if you need one in the future. I'll be here to help you.