Hi there, @droybal. 

Thanks for checking us here in the Community. Normally, when you use a template on an invoice and create another invoice, the regular template will display again. 

This setting will remain until there are changes made with the Invoice Template drop-down.

We can re-sort the template list to fix this. Here’s how:

1. Go to the List menu bar and click Templates.

2. Choose View and select Re-sort List.

3. Click OK.

Then, save your customized template preference again. Here's how:

1. Go to the Customers menu bar and select Create Invoices.

2. Create a new test invoice with a standard template.

3. Select the Template drop-down menu, then select one of the Intuit templates listed.

5. Enter Customer and Item details on the Invoice, then click Save & Close.

The template option is now the default selection. you can go to Customers and select Create Invoices. 

You can also check out this article for additional information: Fix common issues when you use and customize templates.

For future reference, you'll want to learn about creating and use custom fields to personalize your sales forms in QuickBooks Desktop. 

Let me know if there is anything else I can do to help. Enjoy your day!