Double Posts Appearing

Our scheduled posts are seeing double posts in exactly the same way as this thread: http://wordpress.org/support/topic/double-buffering-both-fb-and-twitter?replies=8

i.e. when a scheduled post is due to go out we get double posts – first one with just an image, second one with image and text/url.

We are using WP 3.8.1 and WP to Buffer 2.3.3. We do not have any plugins installed to do with “missed scheduled”.

Any advice most appreciated.

https://wordpress.org/plugins/wp-to-buffer/