Fixed it! Edited the content.php file in my child theme of Iconic One – changed this:
<?php if ( is_sticky() )
the_content();
else;
the_excerpt();
?>
to this:
<?php if ( is_sticky() )
the_content();
else
the_excerpt();
?>
And it removed the extra excerpt from the full content sticky post.
UPDATE:
Figured out the reason why only part of the full post was showing up. It was due to my having a <!–more–> tag in the code from before we were going to show the full post.
Now I have the non-sticky posts showing normally and the sticky posts with both the full post and the excerpt.
Screenshot
