Content blocks don't drop below one another on mobile

@garymichael1313 I did a little one off page — to start fresh. I followed the flex mode and seems that the mobile is correct now, but I can’t figure out how to get the divs to be next to each other in that overall 1000px wide div, so that they can e two in line and then drop to the next and so on. Here are some screenshots:

DESKTOP SECTIONS AND DIVS VIEW:

DESCTOP TOP DIV VIEW:

DESCTOP BOTTOM DIV VIEW:

MOBILE TOP DIV:

MOBILE BOTTOM DIV:

Can you see if I missed something?

Thank you again!!