I am having a big problem with my top slider loading so slowly. I also have a problem with the sidebar appearing in the footer

Hi i would suggest you to use few plugins to get your site load faster like a caching plugin if you are on wordpress secondly optimise your images used in slider you may use ewww optimiser plugin to do this task for you.
Reduce javascripts by uninstalling plugins that are not actually in use for your site

Hello Sonia ! 
– About the loading, I would agree with Well Wisher opinion. You can try those plugins out.
– About the footer sidebar, since this is not our theme, it’s hard for me to detect the real issue and give you a proper solution. Maybe you want to contact the theme author?
Regards

I’m also having this same problem which my sidebar goes to the bottom of the page, and i’v tried many themes and on different blog, its still the same, i’m sure this problem comes from the plugin. please fix example page

Hello Aseize ! I have checked your site and I do not see the Q&A page in the site, I think you have disable plugin. Please check again.
Regarding your issue, you can find here for the guide on how to integration the plugin with theme:http://cmspioneer.com/designwall/guide/dw-question-answer-plugin/#Style_integration
Hope this helps !

Hi Aseize !
Firstly, you can find here for the guide on how to create 2 file: content-start-wrapper.php, content-end-wrapper.php.
http://designwall.com/guide/dw-question-answer-plugin/#Style_integration
– Please add the following code to the content-start-wrapper.php file:

  <div id="single-content" class="content">
    <div class="content-inner">
        <div id="post-entry">
            <section class="post-entry-inner">
            <?php if( is_page() || is_archive() ) { ?>
            <header class="page-header">
                <h1 class="page-title"><?php _e( 'Question & Answer', 'dw-page' ); ?></h1>
            </header>
            <?php } ?>

– Please add the following code to the content-end-wrapper.php file:

     </section>
        </div>
    </div>
</div>
<div id="right-sidebar" class="sidebar">
   <?php get_sidebar('right'); ?>
</div>

If you still face there issue, please send me username & password of your site (via private anwser) for further checking.
Hope this helps !