Sharepoint Double Accordion

HTML & CSS
2

Do a search for if (index > 0)
Once found, comment out that portion:

// Collapses all <h2> blocks except for the first encountered
if (index > 0) {
$(this).toggleClass('expand').nextUntil('h2').slideToggle(100);
}

I got this from reading the comments at the bottom of your page.