I have a feeling you’re just misunderstanding how you’re applying certain content to certain pages. On this “blog” page did you by chance set it as your “posts page” under Settings > Readings? If so, then that means anything you do on that page is irrelevant because WordPress is using the theme homepage to display for that page.
So tell me a little more about what you’re actually doing and what you’ve setup and I’m sure can tell you what you’re doing wrong. But right now, you’re not really giving me much.