items_to_show not working properly

Hi, I have setup 4 item to show in shortcode, but it is showing only 3 post. what I’m missing? ordering & other settings are also not working.basically it is showing default, I can not setup my own choice

here is my shortcode:
[wp_posts_carousel template=”compact.css” post_type=”post” all_items=”20″ show_only=”id” ordering=”asc” categories=”” tags=”” show_title=”true” show_created_date=”false” show_description=”false” allow_shortcodes=”true” show_category=”false” show_tags=”false” show_more_button=”true” show_featured_image=”true” image_source=”thumbnail” image_height=”100″ image_width=”100″ items_to_show=”4″ slide_by=”1″ margin=”5″ loop=”true” auto_play=”false” stop_on_hover=”false” auto_play_timeout=”1200″ nav=”true” nav_speed=”800″ dots=”true” dots_speed=”800″ lazy_load=”true” mouse_drag=”true” mouse_wheel=”true” touch_drag=”true” easing=”linear”]

live link: http://omninerds.com/greenstudentfund/

https://wordpress.org/plugins/wp-posts-carousel/