i´m trying to understand what I did wrong with my web page and I can´t figure it out.
I create a page with 4 breakpoints (1200, 900, 480, 320px) and I draw a rectangle to be my header with my navigation bar. it work perfectly except when it gets to the 900px breakpoint on the browser; that rectangle comes down near the center of the page.
the footer works fine and I did the same way.
Have you uploaded your site? please share the URL of the same so that I can try replicating your issue and try to figure out a solution.