Ahh, I think I understand.
I set everything up at the default Desktop break point, which was 1542px. my desktop resolution is 1920px. You are correct. When I scale my window down everything shows correctly.
I set a break point at 1920 and re-exported after correcting the font colors and clearing some browser history things are now looking correct. FF still has a few issues, but think that is the browser. Chrome looks correct on all pages at full screen.
So if I understand correctly, changes I apply at desktop view will effect smaller break points, but changes I make in smaller breakpoints won't effect the larger ones. i.e. if something doesn't look right in the cell phone breakpoints, I can arrange things differently and that won't change arrangement in larger break points.
When you speak - You repeat what you already know.
When you listen - You learn.