Why would you want bla.jpeg to flow into the first
section on the page
but not the second? If you want to break before non-initial chapters,
you could do
What he wants is for the first image to flow anywhere it likes (since
it isn't part of any chapter), but the second image (which is part of
chapter 1) to stay within chapter 1. Were there an image in chapter 2,
it would stay within chapter 2. Were there an image inbetween chapters
1 and 2, it would flow into chapter 2.