Hi Michael Barshinger , thanks for your question!
H1 is reserved for the article title itself. This ensures there is only one H1 on the page which is preferred by search engines. In the content of your post the highest level heading is H2.
The indentation on the table of contents is part of the theme formatting definition. I've updated your theme so it no longer indents the H2's. I hope that helps! Let us know if you have any further questions.