My previous post on Feb 6, title above, is closed. My inquiry of how to get checking and savings accounts to auto-reconcile was successfully answered. The statement was confirmed that "brokerage (or any investment accounts) are unable to auto-reconcile".
Since I fixed all my checking and savings accounts, I find that my brokerage accounts are suddenly partially auto-reconciling. Under "Investment" accounts I have a brokerage account and 3 IRAs. Two of them immediately show the reconcile window when I accept downloaded transactions, and one of those automatically reconciles when I manually enter the current cash balance and click "OK" . The other does not - I have to click "Reconcile", where the window shows difference between online balance and Quicken balance is 0.00, and click to finish. The other two do not bring up the reconcile window at all until I click "reconcile".
Just wondering why these investment accounts behave differently from each other? I don't see any difference in settings. As was pointed out, the option for "auto reconcile" does not exist for these accounts.