Please make sure that you've connected your Instagram account via our Account Manager page. If you can not still see your account it is probably because you've logged in via Facebook.
At the time of this writing the official Instagram API does not let developers have access to the full Instagram experience thus there are a couple of limitations with publication.
You can read more about the limitations in the Instagram API documentation.
In order to get the full Instagram experience you will have to manually login using our other method.