Agree with Often1 - Move on.
When you are able to open accounts elsewhere, it is a clear indication you are not in government's ban list. Also, when you are able to open an checking with BofA, it also means you are not on BofA ban list as well.
Bottom line - regardless you are telling the whole truth or hiding something, there is not enough to tell what exactly happened. You just have to accept the fact that BofA does not want your investment businesses.
Also - a financial institution can file a SAR when it sees fit. Just because there is a SAR filed against you, it does not mean anything. Also - the SAR is to assist the government, not for internal purpose. So your success in opening a BofA checking actually resolves such myth for you.