Why am i having two sent folders

I have my email configured with android native email software and also on email client.

I notice few issues in em client on desktop.

  1. I see two sent folders. One is called “Sent” and the other is named as  “Sent Messages”

More issues in these two folders

  1. When i click on “sent messages” folder, it shows all subject headers as empty

  2. Folders should be highlighted in color when a particular folder tab is active. Come on Guys , BASIC things in UI & UX ?? Who is doing the testing and product evaluations? 

See my screen shots? 

Common sense thing in email software . If you guys have NO CLUE, look at other email clients and see how you can improve.