I have never seen that "centered" picture. It might be coming from your theme? What theme are you using? And what version of Moodle?
Adaptable theme, Moodle 3.3.2
Well, I do not run Adaptable and therefore can't help. Maybe someone else will know.
You might want to look through the Adaptable theme settings.
You might want to look through the Adaptable theme settings.