Category menu showing sub category by default

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.4
-- Browser(s) name and version -- : Firefox 35.0.1

I see in the code for id category_pane_0 the class is set to pane-toggle-down
<h3 id="category_pane_0" class="title pane-toggler-down">

and the rest of the category pane after 0 is the class id is pane-toggler title

<h3 id="category_pane_1" class="pane-toggler title">

My issue is that first category is automatically showing the sub category because the code is set to pane-toggler-down for the first category pane. The rest of menu just shows the first category.

How can I get the first category to not show the sub category by default?