Having trouble with multiple email accounts in the mail app

So I just got a MacBook so this is all new to me. I am trying to setup 3 email accounts in apple mail...but I am having an issue.

My first account titled GTS is imported but under it it doesn't have the standard Inbox,Sent, Trash, All Mail.....

These boxes are located above but this doesn't seem right, because when I add a second account that inbox is now a "merged inbox" of both accounts.

https://imgur.com/a/2QHkm