I've changed my icon and banner multiple times

SDS

And yet every post I make the generic one pops up. What am I missing?

SDS

Idk what your screen looks like depending on the device...but in the top right corner you wanna hit the options thing, the 3 horizontal lines. Not the little person or the question mark, the hamburger thing. And then the last option underneath settings should be logout. For me it's greyed out but it works anyways. Logout, and then log back in