The hashtags are links, therefore they're underlined.
In your footer.php you have to change the 5 columns to 4, so every time an element has the "one_fifth" class you can change it to "one_fourth" like this:
<!-- ####### FOOTER CONTAINER ####### -->
<div class='container_wrap' id='footer'>
<div class='container'>
<div class="one_fourth first">
<span class='arrow-down'></span>
<?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('Footer - column1') ) : else : avia_dummy_widget(1); endif; // dummy widgets defined at the bottom of sidebar-widgets.php ?>
</div>
<div class="one_fourth">
<span class='arrow-down'></span>
<?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('Footer - column2') ) : else : avia_dummy_widget(2); endif; // dummy widgets defined at the bottom of sidebar-widgets.php ?>
</div>
<div class="one_fourth">
<span class='arrow-down'></span>
<?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('Footer - column3') ) : else : avia_dummy_widget(3); endif; // dummy widgets defined at the bottom of sidebar-widgets.php ?>
</div>
<div class="one_fourth">
<span class='arrow-down'></span>
<?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('Footer - column5') ) : else : ?>
<a href='<?php echo get_permalink(avia_get_option('avia, email_page'));?>' class='custom_button rounded'><strong><?php _e('Contact Form','avia_framework'); ?></strong><span><?php _e('get in touch with us','avia_framework'); ?></span></a>
<p><?php _e('This site uses valid HTML and CSS. All contents Copyright ©','avia_framework'); echo get_bloginfo('name');?></p>
<?php endif;?>
</div>
</div>
In the above example you'll also notice I removed one of those blocks. This should solve your width issues.
To remove the underlining of your hashtags add this to your custom.css
a.twitter-link{
border-bottom:none !important;
float:left;
}
The float line is optional and can be removed if you'd like.
I hope this helps :)