styling quicktabs: strange list classes - change/add class for li elements

On page load I would like to style the default tab (the one showing) as active. But the current HTML structure doesn't allow for that (pls correct me if I miss something).

Here is the HTML when the page loads (the first li is the default tab):

<ul class="quicktabs-tabs quicktabs-style-nostyle active"><li class="active first"><a href="/content/contact-us-0?qt-contact_us_landing_page=0#qt-contact_us_landing_page" id="quicktabs-tab-contact_us_landing_page-0" class="active quicktabs-loaded jquery-once-2-processed">Listed alphabetically</a></li>
<li class="active"><a href="/content/contact-us-0?qt-contact_us_landing_page=1#qt-contact_us_landing_page" id="quicktabs-tab-contact_us_landing_page-1" class="active jquery-once-2-processed">Listed by country</a></li>
<li class="last active"><a href="/content/contact-us-0?qt-contact_us_landing_page=2#qt-contact_us_landing_page" id="quicktabs-tab-contact_us_landing_page-2" class="active jquery-once-2-processed">Listed by region</a></li>
</ul>

Strangely enough all li elements have the class "active" while only the default one should have active. I could work around this if the second list element had an additional class like "class="active second" but it hasn't.

Could somebody please point out how I could remove the "active" classes from the second and third list element?

I am confused that this question has not come up yet. Do I miss something or is this a bug?