Why are we suddenly only able to only use the first six products and services when billing our customers?

Hi there, @johna6789. I want to ensure you'll be able to bill your customers with the right products and services.

To further check why it's only showing the first six products and services on your end, we can perform some troubleshooting steps by logging in via incognito mode or a private window. This way, it confirms if the cache is the cause.

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once you log in, try to bill your customer again. Then, check out this article to learn how to receive invoice payment in QuickBooks Online. 

Additionally, I'm attaching our Community link in case you need help adding, organizing, and sending invoices: Invoices and payments.

If there's anything else I can help you with, please let me know in the comment section down below. I'll always be around. Take care, johna6789.