Hello Lea,

You can adjust the margins/padding between headings and subheadings in various different ways.

1. By editing the php file controlling that section.
2. With some CSS code targeting all sections or just specific sections

To your 2nd question, you should have an option to set the number of pricing tables per row, if there is just 2 they should be centered.

can you send me a link to your site so I can have a look?