I just do it all in Notepad and copy it over . . .
My dyslexia likes Notepad.
Anyway, not the issue at all. I post a new topic -- actually cut-n-paste a new topic -- save it, then look at it and it's fine with all pics neatly centered. Title labels are centered as well just so they would stand out. A few days later, I come back to the topic and everything is aligned to the left.