I’ve tweaked the code a little bit so that if a customer logs in from your store page, the login page is framed by your store customizations. So a customer can enter your store, login, shop, etc. without ever leaving *your* site. Also, after log in, the customer should be automatically redirected to the page they logged in from.
One other thing — for HC Standard users, if the payment confirmations are annoying you, you can turn them off on your “Profile” page (very last option on that page).