For different emails, why are some inbox folders top folders and others are grouped under main email folder
Including a picture in case description isn't clear. In different email addresses, why are some inbox folders a top level folder but in others it is grouped with all the other folders 'sent, drafts, trash, etc.'. In one you will see that I can collapse all other folders into the Inbox folder. In others, I can't. I'd like all the inbox folders to be top folders so I don't have to either collapse all folders into the email header or leave them all open.
Picture shows the second email with a top level inbox and sent, drafts, trash, etc as subfolders.