In the screen shot above...

• "Gus1234U" is your Username.

• "Entrant" is your Custom Member Title. As you correctly stated, the Edit Your Details page is where you can set or change that. The Community Guidelines page, about 2/5 of the way down, gives a few more details on who can have a custom member title and what kinds of titles shouldn't be used.

• The picture is your Avatar and appears next to all your posts. It's not to be confused with your Profile Picture, which shows a woman standing in water and appears only on your profile page.

• "Be Here Now" is your Status Update. You can change it by clicking on the Edit link next to it (and clicking "Edit" again to save the changes when you're done).

I'm confused because you seem to be saying that you want to change one of the above and even describing how that's done, but then you apparently use a different control and change the other instead. I gather that you've successfully changed your Custom Member Title at least once before, or it would say "Elder" (the default title for someone with 5000+ posts) instead of "Entrant".

.