Let's get this working, David 66.

This behavior about printing the same checks again is often caused by damage data. I recommend running the Verify/Rebuild tool. This helps identify the most commonly known data issues within the file and resolves it.

Before we begin with the troubleshooting, let's secure a backup of your company file. Once done, we can proceed to verifying and rebuilding your data in QuickBooks Desktop.

1. From the File menu.
2. Click on Utilities.
3. Select Rebuild Data/ Verify Data.
   

However, if the above steps doesn't work, I suggest to set up a callback with our QuickBooks Support to help you with the back up process.  Also, if you have a case number, I suggest keeping it handy so the next representative will know what are the steps you've taken so far.

Here are the steps to contact support:

1. Click Help at the top menu and select QuickBooks Desktop Help.
2. In the Have a Question? window, enter a topic.
3. Click Contact us.
4. Hit the Stat Messaging button.
   

Please take note our operating hours for chat support depends on the version of QuickBooks that you're using. Please see this article for more details: Support hours and types.

I'd appreciate if you can update me on how it goes. I'll be here if there's anything else you need.