In QuickBooks, transactions with similar descriptions follow the same payee name when edited. Let me add some details about this and help you further.
Currently, there's no option to turn this off in QuickBooks. But you can create bank rules to efficiently categorize your transactions.
In addition, when you create bank rules, this allows you to rename your transactions without updating it on the others.
To create your bank rules, you can follow the steps below:
You can also read this article for more information: How to Set and Use Banking Rules for Downloaded Transactions?
Please don't hesitate to get back to me if you need help with anything else. I'd be happy to help.