Hello matore,
Hmm I would like to know that is it only this user email address receive multiple email notification ( ads.matore@gmail.com )? or your subscriber also getting multiple email notification?
Can i test a post in your site and reproduce on this issues? Also, could you mind help me create a new registered user in your site, so i can subscribe in your blog site and create a test blog post using this user account "fastadmin" , then double check in my email and see is it receive the multiple same email notification.
We will glad to assist you, hope you can accept our requirement.