"Publicize to Tumblr" is a real time-saver, but when I have posts with more than one image, WP.com seems to be selecting the final image to send to Tumblr, whereas I want the first image used (as would most people, surely). The theme I use doesn't support featured images, so it's not down to that. How does WP choose which of multiple images to crosspost, and is there any way I can select which image is shown?
The blog I need help with is burglaralarmbritain.me.