Thanks for following up with the Community, dbur971. I appreciate you performing SarahannC and LeizylM's recommended troubleshooting steps.
Since none of our recommended processes have solved your problem with invoice order, I'd recommend getting in touch with our Customer Care team. They'll be able to pull up the account in a secure environment, conduct further research, and create an investigation ticket if necessary.
They can be reached while using QuickBooks.
Here's how:
- In your top menu bar, go to Help, then QuickBooks Desktop Help.

- Click Contact Us.

- Enter a brief description of the issue in our Ask a question (or tell us what's wrong) field, then hit Continue.

- Select We’ll contact you for a callback or Message Us to start an instant messaging session.
If you can't reach them inside of your product, they can also be reached through our website.
Be sure to review their support hours so you'll know when agents are available.
I'll be here to help if there's any additional questions. Have a lovely day!
Since support is unlikely to help with this version of QB I just went back to my last good copy and re-entered everything since then again. Invoice tab order is fixed again. Good reason to save a dated copy of each updated QB file.