This is an issue that developed some time after April 2nd. Since that time I believe both Jetpack and Luminescence Lite have had updates. The post on the site with a legacy post created before they upgraded is here.
The problem now is that I can't get any gallery option to show up in the admin, making the creation of new galleries impossible. This is not exclusive to Jetpack. I tried installing the "Tiled Galleries Without Jetpack" plugin and the only sign I could see of it being installed was in the list of installed plugins. The issue is solved if I switch to a default theme, clearly not a happy solution for anything else! I have been in touch with Jetpack support and they say it's probably a theme issue and they would be happy to work with the theme developer to sort it out. I have considered trying another plugin but the next step is premium and I'd hate to pay the money and run into the same issue.
Can you sort this out?