Thanks for sharing a screenshot of the invoice, sooverit2.

The new layout has been implemented for a while now. Although, not all customers are using it since the update was released in increments.

Here's an article that talks about this changes for more details: See What’s New With Estimates and Invoices in QuickBooks Online.

You'll want to use the Audit Log report. Similar to what you can see in the old invoice, this will let you review all changes made to the transactions. Here's how: 

1. Go to the Gear or Settings ⚙ icon and select Audit Log.
2. Click Filter.
3. Use the fields on the Filter panel to choose the appropriate User, Date, or Events filter to narrow the results. You can select the name of the owner or user who made the changes to easily locate the transactions.
4. Click Apply.

Let me share these articles for additional reference about using this feature:

• Use the Audit Log in QuickBooks Online
• How to View Transaction Changes in the Audit History 

Don't hesitate to get back here and let me know if you're able to find out what happened to the transactions. We're always here if you need anything else.