http://www.cscottbeardsley.com/
Most of my posts have lots of videos, so the posts have text and urls; no images are attached. I use Thumbnail For Excerpts to display post images on the blog page, and either Video Thumbnail Auto-Feature or Video Thumbnails to set Featured Images for the videos.
2 out of 3 themes that I try display duplicate thumbnail images on archive pages. The blog page in most cases comes out okay. In most cases, when there is an issue the html looks something like this:
<div class="entry-content">
<a href="http://www.cscottbeardsley.com/2012/09/17/japan-top-10-songs-billboard-japan-hot-100/">
<img width="150" height="150" src="http://www.cscottbeardsley.com/wp-content/uploads/2012/09/035-150x150.jpg" class="alignleft tfe wp-post-image" alt="japan-top-10-songs-billboard-japan-hot-100" title="japan-top-10-songs-billboard-japan-hot-100"></a>
<a href="http://www.cscottbeardsley.com/2012/09/17/japan-top-10-songs-billboard-japan-hot-100/"><img width="150" height="150" src="http://www.cscottbeardsley.com/wp-content/uploads/2012/09/035-150x150.jpg" class="alignleft tfe wp-post-image" alt="japan-top-10-songs-billboard-japan-hot-100" title="japan-top-10-songs-billboard-japan-hot-100"></a>
So I have 2 images with the same class
.alignleft.tfe.wp-post-image
one right after the other.
The only mention of thumbnails whatsoever in the Yoko theme template files was in content-two-col.php
<?php if ( '' != get_the_post_thumbnail() ) :?>
and functions.php (
<add_image_size...?>
and there was no effect at all when those were commented out.
The Yoko theme by Elmastudio is offering up the most unique set of issues I have seen. It displays 3 images on the blog page, and 2 on the archive pages.
The 3 images are in the form of 1:
div.entry-details
.attachment-thumbnail.wp-post-image
#content.post.img.wp-post-image
and 2
div.entry-content
.alignleft.tfe.wp-post-image
#content.post.img.wp-post-image
On the archive pages there is one of each of the above image setups.
I have already switched out my theme and will continue to look for a solution, but any assistance would be much appreciated.