Unfortunately the info here is not misinformation, mostly. Here is my experience and information from immigration professionals.
1. I talked with a lawyer yesterday and he said that application cannot be updated until we get AoR (or application is successfully linked to web account?).
2. If the visa denial is by US, it is detected very soon. I already put URL of the article in this thread.
3. Some people failed to defend the mistake and got sanctioned. I already put URL, too.
However,
1. At least one of professionals says the mistake can be fixed.
2. At least one of professionals said that consultation will be needed to determine if it can be fixed. He did not say that the mistake is the end of application.
So, I strongly recommend to talk with a professional before making a decision, and please DO NOT try to defend for the mistake by yourself. Ask professional help.