The amount on one invoice keeps increasing everytime I do a new invoice. Unable to edit or delete

Welcome to the Community, b-b_ma-yahoo-com.

Did you get any error messages when you tried to edit or delete an invoice? This will assist me in identifying and providing a great solution.

In the meantime, let's perform troubleshooting steps to isolate this. Sometimes unexpected behavior happens when your browser stores too much cache. You can start by accessing your QBO account using an incognito window. Here are the shortcut keys:

• Google Chrome: press Ctrl + Shift + N 
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

If it works, return to your regular browser and clear the cache. This improves your browser experience and removes unwanted site data. You can also use different supported browsers.

I've also added this article for future reference: Record invoice payments in QuickBooks Online.

I'm only a few clicks away if you need assistance with your other QuickBooks tasks. It's always my pleasure to help you out again.