It sounds like it has to do with what information the providers share by default. I believe these steps should fix it:
- Log in to https://dashboard.janrain.com/
- Select your Engage application
- In the "Providers" box, hover over the one that you are trying to authenticate with
- Click the small wrench icon that appears after you've hovered over the provider
- Make sure that the "Ask" box is checked next to "email"
Let me know if that works out for you!