I’m having the same issue and came here for the same reason, coincidentally.
Site URL: https://euromaidanpress.com
WordPress version: 3.9.1
Plugin version: 0.3.2
Multisite enabled: no
Server software: Apache
PHP version: 5.4.16
I think in both cases we have plugins installed for social media that go in at either the beginning or the end of the post. In my author box, the Author Customization script is considering the author bio as a “post” and is re-inserting these plugins at the top and bottom of the author box.
Here is a screen shot:
https://imgur.com/10l3hGH