Hi there, sparkle8487.
We haven't changed the Customer Center interface in QuickBooks Desktop. Let's try opening a sample file to isolate this issue.
If it's showing all invoices for that specific customer, I recommend repairing QuickBooks. Doing that typically resolves common behaviors like this.
Before doing so, let's make sure to create a backup copy of your company file. To repair QuickBooks, please follow these steps:
Please let me know how it goes by leaving a comment below. I'll be here to keep helping.