Alignment problems in .mobi file

I’m having trouble with alignments. I have a page with only a large graphic image on it, and using the text alignment buttons and clicking “centered” does not center the image. Every time I compile to .mobi format and open it in my kindle app, the image is left aligned.

Additionally, all of my text paragraphs are always indented, even if I use “left align” and choose 0.00 for first line indent. It shows nicely left-aligned without an indent in the editor, but when I compile to .mobi and open the document in kindle, the indents are back again.

I’d like some stuff to actually end up against the left margin.

Ok, after fiddling around a lot more, I discovered the issue. I had to change the formatting override and compile those pages “as-is”.