By Authrised person, I mean, there is a section in the application that asks if you want to allow someone else to get the correspondence instead of you, usually an Agent, but as his dad and I did my own PR visa, he listed me instead.
I can see the logic in looking more closely if you re-apply, but in reality to them, its simply more revenue. I can also see that you may need the medical if you said you will work in the Medical area. We simply put 'Other' as we have no idea yet.
I dont think it matters what you put compared to what work you end up doing as the Grant letter doesn't have any 'industry' restrictions on it.