If someone comments on any post on my site, that comment gets displayed under another post.
Moreover, if I login to my site. And click on logout link (under comment section) it redirects me to another article after log out.
One possible reason as I read on many places, may be showing related posts. I am using following code for this
<?php do_action('erp-show-related-posts', array('title'=>'Most Related Post', 'num_to_display'=>10, 'no_rp_text'=>'No relevant article found.')); ?>
Which is basically given by a wordpress plugin efficient related post.