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.