I just noticed this on my Iphone 7 that the inbox for my primary account is "All Inboxes" and it includes all the inbox messages I get from it and my secondary account. My secondary account is labelled "Primary" and only shows inboxes for that email account. Why is it like this? Is there anyway I can get each account to just be its own specific inbox? Its really confusing with one accounts inboxes being a aggregate and then all the other accounts are their own.

Also its weird because my "All Inboxes" only collect and compile emails from it and my primary and secondary account, I have a third account, a college one, which don't get collected into the all inboxes. they are just separate in their own account. Why does my "All inboxes" not gather anything from my college/3rd account and only aggregate the other two?

This only happens on the Iphone gmail app, on computer its completely fine.