Jetpack Comments & Publicize Issues

I am having problems with both Jetpack Comments and Publicize.

Issue with Comments.
I activated it, however, on the post page it doesn’t show the option for users to comment using their facebook or twitter login. Moreover, I don’t see anywhere to configure which social network I would like to have enabled or disabled for this in the configurations.

Issue with Publicize.
I enabled the sharing buttons, but they are not showing on the website at all so I am not sure as to what this problem may be.