Accordion FAQ not working as accordion

I am using the accordion FAQ feature with multiple categories on my website (http://www.killernashville.com), but only the first category works as an accordion. The rest of the categories show up as basic. Here is how I have my page short code:

Frequently Asked Questions (not a category)

Conference

[simple-faq style=”accordion” category=”conference-faq-2″]

Schedule

[simple-faq style=”accordion” category=”schedule-faq”]

Agent/Editor/Publisher

[simple-faq style=”accordion” category=”agents-editors-publishers-faq”]

Awards

[simple-faq style=”accordion” category=”awards-faq”]

Manuscript Critiques

[simple-faq style=”accordion” category=”manuscript-critiques-faq”]

Hotel

[simple-faq style=”accordion” category=”hotel-faq”]

Sponsors / Vendors

[simple-faq style=”accordion” category=”sponsors-vendors-faq”]

Bookstore

[simple-faq style=”accordion” category=”bookstores-faq”]

And here is the html code:

<h6>Frequently Asked Questions</h6>
<h3 style="text-align: center;"><span style="text-decoration: underline;">Conference</span></h3>
[simple-faq style="accordion" category="conference-faq-2"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Schedule</span></h3>
[simple-faq style="accordion" category="schedule-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Agent/Editor/Publisher</span></h3>
[simple-faq style="accordion" category="agents-editors-publishers-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Awards</span></h3>
[simple-faq style="accordion" category="awards-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Manuscript Critiques</span></h3>
[simple-faq style="accordion" category="manuscript-critiques-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Hotel</span></h3>
[simple-faq style="accordion" category="hotel-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Sponsors / Vendors</span></h3>
[simple-faq style="accordion" category="sponsors-vendors-faq"]
<h3 style="text-align: center;"><span style="text-decoration: underline;">Bookstore</span></h3>
[simple-faq style="accordion" category="bookstores-faq"]

https://wordpress.org/plugins/simple-faqs/