It says you have to email them with all new information updates but I agree I don't think anyone is looking at your job updates, maybe just that you have a job.
It takes them a lot of time to reply though.
I sent in an update for our phone numbers and my new job, but on an email I received later for an unrelated issue, the old phone number was still there.
I would suggest only sending one email per update to avoid confusion, but, anytime you receive an email from them for something or submit a document, always put your current information and any updates at the bottom clearly, so they see it, and it also creates a clear record of attempt on your part.