Medium Edititor & Formatting Issues

Continuing the discussion from Issue with Medium editor:

Can someone explain how to fix this to me in more detail? I don’t know what the CSS include is or where to move it to. I’m having the same issue as the original poster.
As a side note is this a bug or is this supposed to happen?

To reduce posting I’m also having a separate issue where I cannot limit the size of a bootstrap table. It is automatically resizing depending on the number of characters and I cannot limit it’s max size. I’ve tried putting it into a column, changing class width and appearance but nothing changes.

Thanks!