The online 'status' tells applicants what the state is of the case they have submitted. The application is accessible to INZ officials - they are the people who have to process it. So when I've said 'if someone looks at it', I mean someone from INZ, doing their work. They will only deliberately alter the online record if the case has got to a new stage. However, as you've no doubt also seen, there is a glitch in the system which alters the 'medical received' date for no apparent reason when the case has been accessed.