Bank reconciliation feature

After reading several community articles, I am aware that there is an issue with the way that the banking connections work with Bank of America Credit cards since per each card that they generate a sub-account is created under the parent account to keep each user's transactions separated. 

As a result, when you connect QuickBooks to the bank account QuickBooks creates three accounts one for each user (sub-accounts) and one for the parent account as main accounts instead of realizing that the other two accounts should report to the parent account. 

Per Quicksbooks support you have to disconnect the sub-account from the bank connection feature to make them a subaccount in the system of the parent account. This results in you having to manually upload your bank statements which defits the purposes of the feature. 

Also, when I asked the support agent that okay, I would do this. I then asked if I upload the statement would the system reconise the duplicates and only show me the new transactions that I need to categorize? they said know that I manually have to check them one by one. 

For this reason, I ask for a feature that will allow you to recognize duplicates when uploading the bank statement manually this way the issue of the transactions that were missed by the system can be solved easily.