Events+ - If you display event via Shortcode, Facebook, Twitter login does not appear

I have setup a couple of events with the Events+ plugin, and if you go to the events own permalink (SITE/EVENTS/YEAR/MONTH/PERMALINK), then when you click "I'm Attending" the Facebook, Twitter, Google login options appear.

However, if you incorporate the event as a shortcode onto a page, when you click "I'm attending", you are directed to a WordPress login screen. Is this a bug or have I missed setting it up?

I setup App ID's etc for Facebook and Twitter, and they work fine from the single event page.