Hmm; I've checked that my updates are still there and they are.
I clicked on 'submit' then it goes to a new almost blank page which just says application is acknowledged or something, and then there is a 'close' caption (which doesn't work). At no point do I click on the logout caption on the former page. Maybe you need to give it more time to switch to the acknowlegde page.
I only got an acknowledgement email when I first completed the form - not following updates.