You can only add one profile for each social network linked to SocialPubli. If you have two profiles on the same social network, you will need to create another account on socialpubli.com with a different email from the one you currently have.
For example, if you have two Instagram profiles that you want to register on SocialPubli, you would need to create two SocialPubli accounts with different emails and link each Instagram profile to a SocialPubli account.