Tribute Project Offsetting Columns and Centering

I am laying out my project for the Tribute page. Figured out how to use the column offsetting, but it seems that #timeline does not want to center in md view (sm and larger the md views seems to have the div centered). I added a 1px CSS border just to make it more clear how everything is lining up.

Any clues as to where I am going wrong?

set meta veiwport for respsonsiveness
<meta name="viewport" content="width=device-width, initial-scale=1">

i’ve noticed that you’re using 2 different versions of bootstrap.css, you may think that the latter overwrites the former but the style overlaps, they have different breakpoints and class names. please choose one.

here’s the docs on when the breakpoints happen and how to use offset of your chosen version

responsive breakpoints
bootstrap 3.3:
bootstrap 4.0:

bootstrap 3.3:
bootstrap 4.0:

goodluck (:

Awesome. It seems some of the things I learned in the previous lesson regarding bootstrap are no longer applicable to 4. When I took version 4 out, it seemed to solve the issue, but will still look into the links provided for the future.