Could you edit the file administrator/com_hikashop/classes/currency.php and replace the code
$query = 'SELECT * FROM '.hikashop::table('price').' WHERE '.implode(' AND ',$filters);
by the code
$query = 'SELECT * FROM '.hikashop::table('price').' WHERE '.implode(' AND ',$filters). ' ORDER BY price_value ASC';
and the code
$query = 'SELECT a.* FROM '.hikashop::table('price').' AS a WHERE '.implode(' AND ',$filters);
by the code
$query = 'SELECT a.* FROM '.hikashop::table('price').' AS a WHERE '.implode(' AND ',$filters). ' ORDER BY a.price_value ASC';
and try again ?