Are you waiting for that device page to auto-update because I don't think they do. I think you need to go back to the device list and click on it again and see if the config changes status. Otherwise I think that timer just keep going up.
No, but that's an annoying and possibly related design flaw too. I was refreshing the page but also watching packets get denied in syslog for 10 mins after the change. It actually took that long for the change to be processed.