I resolved the same problem by editing in lib/class.js-accord.php this line:
echo '$("#thethe-accord-'.($i+1).'").accordion({'. implode(',', $opts) .'});' . "\r\n";
into this:
echo '$("#thethe-accord-'.($i+1).'").accordion({'. implode(',', $opts) .',active: false});' . "\r\n";
This way all the accordions on the site will be active:false on load, but this is ok for me